TWI632735B - Built-in beam selection antenna system - Google Patents

一種內藏式波束選擇天線系統，包括接地面、電磁屏蔽罩、第一輻射單元、第一反射單元以及第二反射單元。電磁屏蔽罩設置於接地面。第一輻射單元垂直地設置於接地面的第一邊緣，第一輻射單元包括第一單極天線、第一低頻輻射體與第二低頻輻射體。第一低頻輻射體與第二低頻輻射體分別對稱地設置於第一單極天線的左右兩側，且分別藉由第一開關與第二開關連接至接地面。第一反射單元藉由第三開關垂直連接接地面，第一反射單元位於第一低頻輻射體與電磁屏蔽罩之間。第二反射單元藉由第四開關垂直連接接地面，第二反射單元位於第二低頻輻射體與電磁屏蔽罩之間。 A built-in beam selection antenna system includes a ground plane, an electromagnetic shield, a first radiating element, a first reflecting unit, and a second reflecting unit. The electromagnetic shield is placed on the ground plane. The first radiating element is vertically disposed at a first edge of the ground plane, and the first radiating unit includes a first monopole antenna, a first low frequency radiator, and a second low frequency radiator. The first low frequency radiator and the second low frequency radiator are symmetrically disposed on the left and right sides of the first monopole antenna, respectively, and are respectively connected to the ground plane by the first switch and the second switch. The first reflecting unit is vertically connected to the grounding surface by the third switch, and the first reflecting unit is located between the first low frequency radiator and the electromagnetic shielding cover. The second reflecting unit is vertically connected to the grounding surface by the fourth switch, and the second reflecting unit is located between the second low frequency radiator and the electromagnetic shielding cover.

內藏式波束選擇天線系統 Built-in beam selection antenna system

本發明有關於一種天線，且特別是一種內藏式波束選擇天線系統。 The present invention relates to an antenna, and more particularly to a built-in beam selection antenna system.

室內用無線通信裝置需要讓室內環境中的各種位置和角度，可能是不同隔間或不同樓層，都能夠接收或發送無線信號。例如，無線機上盒需要接收無線存取點(Access Point)的信號，而無線存取點則需要能夠對於室內各個位置的無線裝置提供存取服務。又例如，行動裝置如平板電腦或筆記型電腦(或膝上型電腦)在室內的位置因為使用者的移動而改變，因應移動的情況，行動裝置也須有能力接收來自不同角度的無線存取點的信號。 Indoor wireless communication devices need to be able to receive or transmit wireless signals at various locations and angles in an indoor environment, possibly in different compartments or on different floors. For example, a wireless set-top box needs to receive a signal from a wireless access point (Access Point), while a wireless access point needs to be able to provide access to wireless devices at various locations in the room. For another example, the position of a mobile device such as a tablet or a laptop (or a laptop) in the room changes due to the movement of the user, and the mobile device must also be capable of receiving wireless access from different angles in response to the movement. The signal of the point.

因此，室內無線通信裝置的天線設計方案需要能對於各方向的信號接收(或發送)提供足夠的效能。天線輻射場型的方向性代表了對於各個方向(或角度)的信號收發能力。研發人員需要對於室內無線通信裝置所使用的天線提出符合經濟效益的解決方案。 Therefore, the antenna design of an indoor wireless communication device needs to provide sufficient performance for signal reception (or transmission) in all directions. The directionality of the antenna radiation pattern represents the signal transceiving capability for each direction (or angle). R&D personnel need to come up with cost-effective solutions for the antennas used in indoor wireless communication devices.

本發明實施例提供一種內藏式波束選擇天線系統，利用雙頻的輻射單元、電磁屏蔽罩與反射單元的設計，可用以實現具有可切換輻射場型的雙頻操作的內藏式波束選擇天線系統， 以應用於室內用無線通信裝置。 Embodiments of the present invention provide a built-in beam selection antenna system, which utilizes a dual-frequency radiation unit, an electromagnetic shielding cover, and a reflection unit design, and can be used to implement a built-in beam selection antenna with dual-frequency operation of a switchable radiation field type. system, It is applied to indoor wireless communication devices.

本發明實施例提供一種內藏式波束選擇天線系統，包括接地面、電磁屏蔽罩、第一輻射單元、第一反射單元以及第二反射單元。電磁屏蔽罩設置於接地面。第一輻射單元垂直於接地面且設置於接地面的第一邊緣，第一輻射單元包括第一單極天線、第一低頻輻射體與第二低頻輻射體。第一單極天線設置於接地面的第一邊緣，且利用射頻饋入單元以產生高頻共振模態，其中射頻饋入單元設置於第一單極天線與接地面之間。第一低頻輻射體位於第一單極天線的左側，用以產生低頻共振模態，第一低頻輻射體具有第一延伸部與第一接地部，第一延伸部用以耦合第一單極天線，第一低頻輻射體的第一接地部藉由第一開關連接至接地面。第二低頻輻射體位於第一單極天線的右側，用以產生低頻共振模態，第二低頻輻射體具有第二延伸部與第二接地部，第二延伸部用以耦合第一單極天線，第二低頻輻射體的第二接地部藉由第二開關連接至接地面。第一反射單元垂直設置於接地面之上，且藉由第三開關連接接地面，第一反射單元位於第一低頻輻射體與電磁屏蔽罩之間。第二反射單元垂直設置於接地面之上，且藉由第四開關連接接地面，第二反射單元位於第二低頻輻射體與電磁屏蔽罩之間。 Embodiments of the present invention provide a built-in beam selection antenna system including a ground plane, an electromagnetic shielding cover, a first radiating element, a first reflecting unit, and a second reflecting unit. The electromagnetic shield is placed on the ground plane. The first radiating element is perpendicular to the ground plane and disposed at the first edge of the ground plane, and the first radiating unit includes a first monopole antenna, a first low frequency radiator and a second low frequency radiator. The first monopole antenna is disposed on the first edge of the ground plane, and uses a radio frequency feeding unit to generate a high frequency resonant mode, wherein the radio frequency feeding unit is disposed between the first monopole antenna and the ground plane. The first low frequency radiator is located on the left side of the first monopole antenna for generating a low frequency resonance mode, the first low frequency radiator has a first extension portion and a first ground portion, and the first extension portion is configured to couple the first monopole antenna The first ground portion of the first low frequency radiator is connected to the ground plane by the first switch. The second low frequency radiator is located on the right side of the first monopole antenna for generating a low frequency resonance mode, the second low frequency radiator has a second extension portion and a second ground portion, and the second extension portion is configured to couple the first monopole antenna The second ground portion of the second low frequency radiator is connected to the ground plane by the second switch. The first reflecting unit is vertically disposed above the grounding surface, and is connected to the grounding surface by the third switch, and the first reflecting unit is located between the first low frequency radiator and the electromagnetic shielding cover. The second reflective unit is vertically disposed above the ground plane, and is connected to the ground plane by the fourth switch, and the second reflective unit is located between the second low frequency radiator and the electromagnetic shield.

綜上所述，本發明實施例提供一種內藏式波束選擇天線系統，為利用雙頻的輻射體實現雙頻操作的波束選擇天線系統，利用兩個反射單元配合電磁屏蔽罩以實現高頻輻射場型切換，且利用兩個低頻輻射體的切換以實現低頻輻射場型切換，可達到多方向性輻射場型涵蓋的效果。並且，第一輻射單元僅需設 置在接地面邊緣，可以顯著地節省天線系統在室內用無線通信裝置中所佔用的空間。 In summary, the embodiments of the present invention provide a built-in beam selection antenna system, which is a beam selection antenna system that implements dual-frequency operation by using a dual-frequency radiator, and uses two reflection units to cooperate with an electromagnetic shielding cover to realize high-frequency radiation. Field mode switching, and the use of two low-frequency radiator switching to achieve low-frequency radiation field switching, can achieve the effect of multi-directional radiation field coverage. And, the first radiating element only needs to be set Placed at the edge of the ground plane, the space occupied by the antenna system in the indoor wireless communication device can be significantly saved.

為使能更進一步瞭解本發明的特徵及技術內容，請參閱以下有關本發明之詳細說明與附圖，但是此等說明與所附圖式僅是用來說明本發明，而非對本發明的權利範圍作任何的限制。 For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings The scope is subject to any restrictions.

1‧‧‧接地面 1‧‧‧ ground plane

9‧‧‧機殼底座 9‧‧‧Chassis base

11‧‧‧第一邊緣 11‧‧‧ first edge

2‧‧‧第一輻射單元 2‧‧‧First Radiation Unit

3‧‧‧電磁屏蔽罩 3‧‧‧Electromagnetic shield

31、32‧‧‧垂直平面 31, 32‧‧‧ vertical plane

W1、W2‧‧‧寬度 W1, W2‧‧‧ width

29‧‧‧第一單極天線 29‧‧‧First monopole antenna

291‧‧‧第一射頻饋入部 291‧‧‧First RF Feeding Department

21‧‧‧第一低頻輻射體 21‧‧‧First low frequency radiator

22‧‧‧第二低頻輻射體 22‧‧‧Second low frequency radiator

21e‧‧‧第一延伸部 21e‧‧‧First Extension

21g‧‧‧第一接地部 21g‧‧‧First grounding

22e‧‧‧第二延伸部 22e‧‧‧Second extension

22g‧‧‧第二接地部 22g‧‧‧Second grounding

41‧‧‧第一反射單元 41‧‧‧First reflection unit

42‧‧‧第二反射單元 42‧‧‧second reflection unit

51‧‧‧第一開關 51‧‧‧First switch

52‧‧‧第二開關 52‧‧‧second switch

53‧‧‧第三開關 53‧‧‧third switch

54‧‧‧第四開關 54‧‧‧fourth switch

X、Y、Z‧‧‧軸 X, Y, Z‧‧‧ axes

L1、L2、L3、L4、L5、L6、L7、L8、L9‧‧‧波束 L1, L2, L3, L4, L5, L6, L7, L8, L9‧‧ beams

C1、C2‧‧‧虛線部分 C1, C2‧‧‧ dotted line

12‧‧‧第二邊緣 12‧‧‧ second edge

6‧‧‧第二輻射單元 6‧‧‧second radiation unit

69‧‧‧第二單極天線 69‧‧‧Second monopole antenna

691‧‧‧第二射頻饋入部 691‧‧‧Second RF Feeding Department

61‧‧‧第三低頻輻射體 61‧‧‧ Third low frequency radiator

61e‧‧‧第三延伸部 61e‧‧ Third extension

61g‧‧‧第三接地部 61g‧‧‧third grounding

62‧‧‧第四低頻輻射體 62‧‧‧Four low frequency radiator

62e‧‧‧第四延伸部 62e‧‧ Fourth Extension

62g‧‧‧第四接地部 62g‧‧‧fourth grounding

43‧‧‧第三反射單元 43‧‧‧ Third reflection unit

44‧‧‧第四反射單元 44‧‧‧fourth reflection unit

55‧‧‧第五開關 55‧‧‧ fifth switch

56‧‧‧第六開關 56‧‧‧ sixth switch

81、82、83、84、85‧‧‧位置 81, 82, 83, 84, 85‧‧‧ positions

100‧‧‧內部電路板 100‧‧‧Internal circuit board

300‧‧‧電磁屏蔽罩 300‧‧‧Electromagnetic shield

圖1是本發明實施例提供的內藏式波束選擇天線系統的示意圖。 FIG. 1 is a schematic diagram of a built-in beam selection antenna system according to an embodiment of the present invention.

圖2A是本發明實施例提供的內藏式波束選擇天線系統其第一開關導通時的2.4GHz操作頻段的輻射場型圖。 FIG. 2A is a radiation pattern diagram of a 2.4 GHz operating band when the first switch of the built-in beam selective antenna system is turned on according to an embodiment of the present invention.

圖2B是本發明實施例提供的內藏式波束選擇天線系統其第二開關導通時的2.4GHz操作頻段的輻射場型圖。 FIG. 2B is a radiation pattern diagram of a 2.4 GHz operating band when the second switch of the built-in beam selective antenna system is turned on according to an embodiment of the present invention.

圖3A是本發明實施例提供的內藏式波束選擇天線系統其第一開關導通時的5GHz操作頻段的輻射場型圖。 FIG. 3A is a radiation pattern diagram of a 5 GHz operating band when the first switch of the built-in beam selective antenna system is turned on according to an embodiment of the present invention.

圖3B是本發明實施例提供的內藏式波束選擇天線系統其第二開關導通時的5GHz操作頻段的輻射場型圖。 FIG. 3B is a radiation pattern diagram of a 5 GHz operating band when the second switch of the built-in beam selective antenna system is turned on according to an embodiment of the present invention.

圖3C是本發明實施例提供的內藏式波束選擇天線系統其第一低頻輻射體所連接的第一開關與第二反射單元所連接的第四開關導通時的5GHz操作頻段的輻射場型圖。 FIG. 3C is a radiation pattern diagram of a 5 GHz operating band when the first switch connected to the first low frequency radiator and the fourth switch connected to the second reflection unit are turned on according to the embodiment of the present invention. .

圖3D是本發明實施例提供的內藏式波束選擇天線系統其的二低頻輻射體所連接的第二開關與第一反射單元所連接的第三開關導通時的5GHz操作頻段的輻射場型圖。 FIG. 3D is a radiation pattern diagram of a 5 GHz operating band when the second switch connected to the second low frequency radiator and the third switch connected to the first reflective unit are turned on according to the embodiment of the present invention. .

圖4是本發明實施例提供的具有兩組內藏式波束選擇機制的波束選擇天線系統的示意圖。 4 is a schematic diagram of a beam selection antenna system with two sets of built-in beam selection mechanisms according to an embodiment of the present invention.

圖5A是本發明實施例提供的內藏式波束選擇天線系統設置於室內無線通信裝置的示意圖。 FIG. 5A is a schematic diagram of a built-in beam selection antenna system provided in an indoor wireless communication device according to an embodiment of the present invention.

圖5B是本發明另一實施例提供的內藏式波束選擇天線系統設置於室內無線通信裝置的示意圖。 FIG. 5B is a schematic diagram of a built-in beam selection antenna system provided in an indoor wireless communication device according to another embodiment of the present invention.

圖6A是圖4的內藏式波束選擇天線系統其第五開關導通時的2.4GHz操作頻段的輻射場型圖。 6A is a radiation pattern diagram of a 2.4 GHz operating band when the fifth switch of the built-in beam selective antenna system of FIG. 4 is turned on.

圖6B是圖4的內藏式波束選擇天線系統其第六開關導通時的2.4GHz操作頻段的輻射場型圖。 6B is a radiation pattern diagram of the 2.4 GHz operating band when the sixth switch of the built-in beam selective antenna system of FIG. 4 is turned on.

圖6C是圖4的內藏式波束選擇天線系統其2.4GHz操作頻帶的輻射場型切換的示意圖。 6C is a schematic diagram of the radiation pattern switching of the 2.4 GHz operating band of the built-in beam selective antenna system of FIG. 4.

圖7A是圖4的內藏式波束選擇天線系統其第五開關導通時的5GHz操作頻段的輻射場型圖。 7A is a radiation pattern diagram of a 5 GHz operating band when the fifth switch of the built-in beam selective antenna system of FIG. 4 is turned on.

圖7B是圖4的內藏式波束選擇天線系統其第六開關導通時的5GHz操作頻段的輻射場型圖。 7B is a radiation pattern diagram of the 5 GHz operating band when the sixth switch of the built-in beam selective antenna system of FIG. 4 is turned on.

圖7C是圖4的內藏式波束選擇天線系統其第五開關與第八開關導通時的5GHz操作頻段的輻射場型圖。 7C is a radiation pattern diagram of a 5 GHz operating band when the fifth switch and the eighth switch of the built-in beam selective antenna system of FIG. 4 are turned on.

圖7D是圖4的內藏式波束選擇天線系統其第六開關與第七開關導通時的5GHz操作頻段的輻射場型圖。 7D is a radiation pattern diagram of a 5 GHz operating band when the sixth switch and the seventh switch of the built-in beam selective antenna system of FIG. 4 are turned on.

圖8是圖4的內藏式波束選擇天線系統其5GHz操作頻帶的輻射場型切換的示意圖。 8 is a schematic diagram of radiation field switching of the 5 GHz operating band of the built-in beam selective antenna system of FIG.

本發明實施例的內藏式波束選擇天線系統可應於用於各種室內無線通信裝置，尤其是可藉由切換輻射場型以提供需要高傳輸資料量的室內無線通信裝置以便於接收來自不同方向的無線信號。所述室內無線通信裝置例如是筆記型電腦、接收視訊信號的無線機上盒、或智慧電視等，但本發明並不因此限定。再者，本發明實施例的波束選擇天線系統是雙頻操作的應用。 The built-in beam selection antenna system of the embodiment of the invention can be applied to various indoor wireless communication devices, in particular, by switching the radiation pattern to provide an indoor wireless communication device that requires a high amount of data to be received in order to receive from different directions. Wireless signal. The indoor wireless communication device is, for example, a notebook computer, a wireless set-top box that receives a video signal, or a smart TV, but the present invention is not limited thereto. Furthermore, the beam selection antenna system of the embodiment of the present invention is an application of dual frequency operation.

請同時參照圖1，圖1是本發明實施例提供的波束選擇天線系統的示意圖。本實施例的波束選擇天線系統包括接地面1、第一輻射單元2、電磁屏蔽罩3、第一反射單元41以及第二反射單元42。圖1中的機殼底座9則屬於波束選擇天線系統所應用的室內無線通信裝置。接地面1上所設置的電磁屏蔽罩3是用以覆蓋電路以免受到天線所產生的電磁信號的干擾(EMI)。電磁屏蔽罩3一般是設置於接地面1之上的金屬罩子，避免電磁波洩漏至罩子內，以將罩子內的電路與外界隔離，並且電磁屏蔽罩3需要導電連接至接地面1，也就是需要接地。 Please refer to FIG. 1 at the same time. FIG. 1 is a schematic diagram of a beam selection antenna system according to an embodiment of the present invention. The beam selection antenna system of this embodiment includes a ground plane 1, a first radiating element 2, an electromagnetic shield 3, a first reflecting unit 41, and a second reflecting unit 42. The chassis base 9 of Figure 1 is an indoor wireless communication device to which the beam selective antenna system is applied. The electromagnetic shield 3 provided on the ground plane 1 is used to cover the circuit from electromagnetic interference (EMI) generated by the antenna. The electromagnetic shielding cover 3 is generally a metal cover disposed on the grounding surface 1 to prevent electromagnetic waves from leaking into the cover to isolate the circuit inside the cover from the outside, and the electromagnetic shielding cover 3 needs to be electrically connected to the grounding surface 1, that is, it is required Ground.

電磁屏蔽罩3可以例如為長方體的罩體或半球型的罩體，但本發明並不因此限定。在圖1的實施例中的電磁屏蔽罩3是長方體的罩體，且電磁屏蔽罩3靠近接地面1的第一邊緣11的部分是一個垂直平面31，但本發明也不因此限定。在較佳的實施例中，電磁屏蔽罩3的寬度W2至少需要大於第一輻射單元2的寬度W1，寬度W1也是第一反射單元41與第二反射單元42的距離。在圖1的實施例中，電磁屏蔽罩3的寬度W2即垂直平面31的寬度。本發明實施例後續所提到的輻射場型是基於當電磁屏蔽罩3的寬度W2大於第一輻射單元2的寬度W1的情況而得到的。 The electromagnetic shielding cover 3 may be, for example, a rectangular parallelepiped cover or a hemispherical cover, but the present invention is not limited thereto. The electromagnetic shield 3 in the embodiment of Fig. 1 is a rectangular parallelepiped cover, and the portion of the electromagnetic shield 3 close to the first edge 11 of the ground plane 1 is a vertical plane 31, but the invention is not limited thereby. In a preferred embodiment, the width W2 of the electromagnetic shield 3 needs to be at least greater than the width W1 of the first radiating element 2, and the width W1 is also the distance between the first reflecting unit 41 and the second reflecting unit 42. In the embodiment of Fig. 1, the width W2 of the electromagnetic shield 3 is the width of the vertical plane 31. The radiation pattern mentioned later in the embodiment of the present invention is obtained based on the case where the width W2 of the electromagnetic shield 3 is larger than the width W1 of the first radiating element 2.

第一輻射單元2垂直於接地面1且設置於接地面1的第一邊緣11。第一輻射單元2包括第一單極天線29、第一低頻輻射體21與第二低頻輻射體22。第一單極天線29設置於接地面1的第一邊緣11，且利用第一射頻饋入部291以產生高頻共振模態，其中第一射頻饋入部291設置於第一單極天線29與接地面1之間。第一低頻輻射體21位於第一單極天線29的左側，用以產生低頻共振模態，第一低頻輻射體21具有第一延伸部21e與第一接地部21g，第一延伸部21e用以耦合第一單極天線29，第一低頻輻射體21的第一接地部21g藉由第一開關51連接至接地面1。第二低頻輻射體22位於第一單極天線29的右側，用以產生低頻共振模態，第二低頻輻射體22具有第二延伸部22e與第二接地部22g，第二延伸部22e用以耦合第一單極天線29，第二低頻輻射體22的第二接地部22g藉由第二開關52連接至接地面1。第一反射單元41垂直設置於接地面1之上，且藉由第三開關53連接接地面1，第一反射單元41位於第一低頻輻射體21與電磁屏蔽罩3之間。電磁屏蔽罩3與第一單極天線29的距離較佳的為0.15至0.25倍的高頻共振模態(其頻率所對應)的操作波長。第一反射單元41與第一單極天線29的距離可為0.15至0.25倍的高頻共振模態(其頻率所對應)的操作波長。第二反射單元42垂直設置於接地面1之上，且藉由第四開關54連接接地面1，第二反射單元42位於第二低頻輻射體22與電磁屏蔽罩3之間。第一反射單元41與第一單極天線29的距離為0.15至0.25倍的高頻共振模態(其頻率所對應)的操作波長。另外，上述的第一開關51、第二開關52、第三開關53與第四開關54例如是半導體開關，但本發明並不因此限定。 The first radiating element 2 is perpendicular to the ground plane 1 and is disposed at the first edge 11 of the ground plane 1 . The first radiating element 2 includes a first monopole antenna 29, a first low frequency radiator 21 and a second low frequency radiator 22. The first monopole antenna 29 is disposed on the first edge 11 of the ground plane 1 and utilizes the first RF feed portion 291 to generate a high frequency resonant mode, wherein the first RF feed portion 291 is disposed on the first monopole antenna 29 Between the grounds 1. The first low frequency radiator 21 is located on the left side of the first monopole antenna 29 for generating a low frequency resonance mode. The first low frequency radiator 21 has a first extension portion 21e and a first ground portion 21g, and the first extension portion 21e is used for The first monopole antenna 29 is coupled, and the first ground portion 21g of the first low frequency radiator 21 is connected to the ground plane 1 by the first switch 51. The second low frequency radiator 22 is located on the right side of the first monopole antenna 29 for generating a low frequency resonance mode, the second low frequency radiator 22 has a second extension portion 22e and a second ground portion 22g, and the second extension portion 22e is used for The first monopole antenna 29 is coupled, and the second ground portion 22g of the second low frequency radiator 22 is connected to the ground plane 1 by the second switch 52. The first reflecting unit 41 is vertically disposed on the ground plane 1 and connected to the ground plane 1 via the third switch 53 . The first reflecting unit 41 is located between the first low frequency radiator 21 and the electromagnetic shield 3 . The distance between the electromagnetic shield 3 and the first monopole antenna 29 is preferably an operating wavelength of a high frequency resonant mode (corresponding to its frequency) of 0.15 to 0.25 times. The distance between the first reflecting unit 41 and the first monopole antenna 29 may be an operating wavelength of a high frequency resonant mode (corresponding to its frequency) of 0.15 to 0.25 times. The second reflecting unit 42 is vertically disposed on the ground plane 1 and connected to the ground plane 1 via the fourth switch 54 . The second reflecting unit 42 is located between the second low frequency radiator 22 and the electromagnetic shield 3 . The distance between the first reflecting unit 41 and the first monopole antenna 29 is an operating wavelength of a high frequency resonant mode (corresponding to its frequency) of 0.15 to 0.25 times. Further, the first switch 51, the second switch 52, the third switch 53, and the fourth switch 54 described above are, for example, semiconductor switches, but the present invention is not limited thereto.

第一單極天線29產生的高頻共振模態例如是對應於5GHz頻帶的操作，第一低頻輻射體21與第二低頻輻射體22產生的低頻共振模態例如是對應於2.4GHz頻帶的操作。因此，本實施例的波束選擇天線系統可符合目前的Wifi無線網路應用。另外，接地面1的尺寸例如是常見的筆記型電腦(或膝上型電腦)的螢幕或內部電路板的尺寸、無線網路路由器內部的電路板尺寸，或者是數位電視機上盒內部的電路板尺寸，但本發明並不因此限定。 The high frequency resonance mode generated by the first monopole antenna 29 is, for example, an operation corresponding to the 5 GHz band, and the low frequency resonance mode generated by the first low frequency radiator 21 and the second low frequency radiator 22 is, for example, an operation corresponding to the 2.4 GHz band. . Therefore, the beam selection antenna system of the embodiment can conform to the current Wifi wireless network application. In addition, the size of the ground plane 1 is, for example, the size of a screen or internal circuit board of a common notebook computer (or a laptop computer), the size of a circuit board inside a wireless network router, or a circuit inside a box on a digital television set. The board size, but the invention is not limited thereby.

第一單極天線29例如是四分之一波長單極天線。第一單極天線29設置於接地面1的第一邊緣11，且利用第一射頻饋入部291以產生高頻共振模態，其中第一射頻饋入部291設置於第一單極天線29與接地面1之間。所述第一射頻饋入部291例如包括傳輸線，甚至包括阻抗匹配網路，傳輸線例如是同軸傳輸線或微帶線，而傳輸線也可簡單的利用射頻接頭替代。但本發明並不因此限定第一射頻饋入部291的實現方式。 The first monopole antenna 29 is, for example, a quarter-wave monopole antenna. The first monopole antenna 29 is disposed on the first edge 11 of the ground plane 1 and utilizes the first RF feed portion 291 to generate a high frequency resonant mode, wherein the first RF feed portion 291 is disposed on the first monopole antenna 29 Between the grounds 1. The first RF feed 291 includes, for example, a transmission line, and even an impedance matching network, such as a coaxial transmission line or a microstrip line, and the transmission line can be simply replaced with a radio frequency connector. However, the present invention does not thus limit the implementation of the first RF feed 291.

接下來，進一步說明本實施例的第一低頻輻射體21與第二低頻輻射體22的特徵。第一低頻輻射體21的長度與第二低頻輻射體22的長度皆是低頻共振模態其頻率所對應的操作波長的四分之一，其中當第一開關51或第二開關52導通時，對應的第一低頻輻射體21或第二低頻輻射體22被導通至接地面1。在本實施例中，所述第一低頻輻射體21與第二低頻輻射體22是以第一單極天線29為基準而彼此對稱，並且第一單極天線29、第一低頻輻射體21與第二低頻輻射體22皆垂直於接地面1，如此可顯著的減少天線所占用的空間。第一單極天線29、第一低頻輻射體21與第二低頻輻射體22可例如製作於微波基板的一個表面，或以印刷電路技術 實現。在另一實施例中，第一單極天線29、第一低頻輻射體21與第二低頻輻射體22不在同一平面上，例如第一單極天線29、第一低頻輻射體21與第二低頻輻射體22可設置於室內無線通信裝置的機殼(圖未示)內側，例如使用雷射直接成形(Laser Direct Structuring，LDS)技術施作於機殼內側，藉此可將機殼組件與天線整合在一起，但本發明並不因此限定第一單極天線29、第一低頻輻射體21與第二低頻輻射體22的製作方式。 Next, the features of the first low frequency radiator 21 and the second low frequency radiator 22 of the present embodiment will be further described. The length of the first low frequency radiator 21 and the length of the second low frequency radiator 22 are both one quarter of the operating wavelength corresponding to the frequency of the low frequency resonant mode, wherein when the first switch 51 or the second switch 52 is turned on, The corresponding first low frequency radiator 21 or second low frequency radiator 22 is electrically connected to the ground plane 1. In the embodiment, the first low frequency radiator 21 and the second low frequency radiator 22 are symmetrical with each other based on the first monopole antenna 29, and the first monopole antenna 29 and the first low frequency radiator 21 are The second low frequency radiator 22 is perpendicular to the ground plane 1, which can significantly reduce the space occupied by the antenna. The first monopole antenna 29, the first low frequency radiator 21 and the second low frequency radiator 22 can be fabricated, for example, on one surface of the microwave substrate, or in printed circuit technology. achieve. In another embodiment, the first monopole antenna 29, the first low frequency radiator 21 and the second low frequency radiator 22 are not in the same plane, such as the first monopole antenna 29, the first low frequency radiator 21 and the second low frequency. The radiator 22 can be disposed inside the casing (not shown) of the indoor wireless communication device, for example, by using Laser Direct Structuring (LDS) technology, and can be applied to the inside of the casing, thereby the casing assembly and the antenna can be Integrated, but the invention does not thus define the manner in which the first monopole antenna 29, the first low frequency radiator 21 and the second low frequency radiator 22 are fabricated.

接下來進一步說明本實施例的第一反射單元41與第二反射單元42的特徵。第一反射單元41與第二反射單元42例如是片狀的金屬片，第一反射單元41與第二反射單元42也可以是柱形導體，如圓柱形、方柱形、三角柱形、多角柱形的導體，但本發明並不因此限定。第一反射單元41與第二反射單元42的形狀也可以例如是錐形。第一反射單元41與第二反射單元42的長度為第一單極天線29的高頻共振模態其頻率所對應的操作波長的四分之一，使得其與接地面1導通時能成為四分之一波長反射體。 Next, the features of the first reflecting unit 41 and the second reflecting unit 42 of the present embodiment will be further described. The first reflecting unit 41 and the second reflecting unit 42 are, for example, sheet-like metal pieces, and the first reflecting unit 41 and the second reflecting unit 42 may also be cylindrical conductors, such as a cylindrical shape, a square column shape, a triangular column shape, and a polygonal column. Shaped conductor, but the invention is not limited thereby. The shape of the first reflecting unit 41 and the second reflecting unit 42 may also be, for example, a taper. The length of the first reflecting unit 41 and the second reflecting unit 42 is one quarter of the operating wavelength corresponding to the frequency of the high frequency resonant mode of the first monopole antenna 29, so that it can become four when it is electrically connected to the ground plane 1 One-wavelength reflector.

接下來說明圖1的波束選擇天線系統其輻射場型切換的情況。垂直於接地面1的第一邊緣11且往接地面1的內側延伸的方向為+X軸向，垂直於X軸且往第二低頻輻射體22延伸的方向為+Z軸向。先考慮低頻共振模態(2.4GHz)的輻射場型，請參照圖2A，圖2A是本發明實施例提供的波束選擇天線系統其第一開關51導通時的2.4GHz操作頻段的輻射場型圖，當第一開關51導通時(此時第二開關52不導通)，可見有三個較強的波束(或稱為波瓣，是電場較強的角度)，分別是方向落於-X軸向與+Z軸向所涵蓋的象限的波束L1、+X軸向與+Z軸向所涵蓋的象限的波束L2與+X軸向與-Z 軸向所涵蓋的象限的波束L3，換句話說，可視為輻射場型是朝向遠離第一低頻輻射體21的方向偏移。圖2B是本發明實施例提供的波束選擇天線系統其第二開關52導通時的2.4GHz操作頻段的輻射場型圖，當第二開關52導通時(此時第一開關51不導通)，輻射場型為朝向遠離第二低頻輻射體22的方向偏移，詳細的說，圖2B可見有三個較強的波束(或稱為波瓣，是電場較強的角度)，分別是方向落於-X軸向與-Z軸向所涵蓋的象限的波束L4、+X軸向與-Z軸向所涵蓋的象限的波束L5與+X軸向與+Z軸向所涵蓋的象限的波束L6。 Next, the case of the radiation selective switching of the beam selective antenna system of Fig. 1 will be described. The direction perpendicular to the first edge 11 of the ground plane 1 and extending toward the inner side of the ground plane 1 is the +X axis, and the direction perpendicular to the X axis and extending toward the second low frequency radiator 22 is the +Z axis. Referring to FIG. 2A, FIG. 2A is a radiation pattern diagram of a 2.4 GHz operating band when the first switch 51 of the beam selective antenna system according to the embodiment of the present invention is turned on. When the first switch 51 is turned on (when the second switch 52 is not turned on), there are three strong beams (or lobes, which are strong angles of the electric field), and the direction is in the -X axis. Beams L1 and +X axial and -Z with quadrants covered by the +Z axial quadrant and L1 and +Z axial quadrants The beam L3 of the quadrant covered by the axial direction, in other words, can be regarded as the radiation field type being shifted toward the direction away from the first low frequency radiator 21. FIG. 2B is a radiation pattern diagram of a 2.4 GHz operating band when the second switch 52 is turned on in the beam selective antenna system according to the embodiment of the present invention. When the second switch 52 is turned on (the first switch 51 is not turned on), the radiation is performed. The field pattern is offset away from the direction of the second low frequency radiator 22. In detail, FIG. 2B shows that there are three strong beams (or lobes, which are strong angles of the electric field), and the directions are respectively - The beam L4 of the quadrant covered by the X-axis and the -Z axis, and the beam L5 of the quadrant covered by the -Z axis and the beam L6 of the quadrant covered by the +Z axis and the +Z axis.

接下來，考慮高頻共振模態(5GHz頻帶)的輻射場型，在此以5.5GHz的輻射場型作為整個5GHz頻段的輻射場型代表。當第一開關51、第二開關52、第三開關53與第四開關54皆不導通時，高頻共振模態(5GHz頻帶)所對應的輻射場型朝向接地面1偏移。以下考慮第一低頻輻射單元21與第二低頻輻射單元22的狀態切換情況，第一低頻輻射單元21與第二低頻輻射單元22兩者擇一被導通。圖3A是本發明實施例提供的波束選擇天線系統其第一開關51導通時的5GHz操作頻段的輻射場型圖，在此情況下第二開關52不導通。圖3B是本發明實施例提供的波束選擇天線系統其第二開關52導通時的5GHz操作頻段的輻射場型圖，在此情況下第一開關51不導通。由圖3A與圖3B可見，此兩種情況的高頻共振模態(5GHz頻帶)的輻射場型基本上是基於X軸對稱的。並且，高頻共振模態輻射所產生的能量有部分被電磁屏蔽罩3反射，造成遠離接地面的方向(-X軸向)具有一個強度較大的波束L7(或稱為波瓣，是電場較強的角度)。也就是說，電磁屏蔽罩3使高頻共振模態所對應的輻射場型朝向遠離接地面1的一側偏移。另外，朝向接地面的方 向(+X軸向)也有另兩個強度較大的波束L8、L9。 Next, consider the radiation pattern of the high-frequency resonance mode (5 GHz band), where the radiation field of 5.5 GHz is used as the radiation field type of the entire 5 GHz band. When the first switch 51, the second switch 52, the third switch 53, and the fourth switch 54 are not turned on, the radiation pattern corresponding to the high-frequency resonance mode (5 GHz band) is shifted toward the ground plane 1. Considering the state switching of the first low frequency radiating unit 21 and the second low frequency radiating unit 22, the first low frequency radiating unit 21 and the second low frequency radiating unit 22 are selectively turned on. FIG. 3A is a radiation pattern diagram of a 5 GHz operating band when the first switch 51 of the beam selective antenna system according to the embodiment of the present invention is turned on, in which case the second switch 52 is not turned on. FIG. 3B is a radiation pattern diagram of a 5 GHz operating band when the second switch 52 of the beam selective antenna system according to the embodiment of the present invention is turned on, in which case the first switch 51 is not turned on. As can be seen from FIG. 3A and FIG. 3B, the radiation pattern of the high frequency resonance mode (5 GHz band) of the two cases is basically based on the X-axis symmetry. Moreover, the energy generated by the high-frequency resonant mode radiation is partially reflected by the electromagnetic shielding cover 3, causing a beam L7 (or called a lobe, which is an electric field) having a large intensity in a direction away from the ground plane (-X axis). Stronger angle). That is, the electromagnetic shield 3 shifts the radiation pattern corresponding to the high-frequency resonance mode toward the side away from the ground plane 1. In addition, the side facing the ground plane There are also two other beams L8 and L9 with higher intensity in the (+X axis).

接著，圖3C是本發明實施例提供的波束選擇天線系統其第一低頻輻射體21所連接的第一開關51與第二反射單元42所連接的第四開關53導通時的5GHz操作頻段的輻射場型圖，其中虛線部分C1的場型是圖3A的輻射場型，可見相比於圖3A的輻射場型(虛線部分C1)，第二反射單元42使得在-X軸向與-Z軸向所涵蓋的象限的輻射強度被增強，如圖3C中箭頭所指的方向的輻射強度增強，也就是說，第二反射單元42使高頻共振模態所對應的輻射場型進一步朝向相對於第二反射單元42的方向偏移。接著，參照圖3D，圖3D是本發明實施例提供的波束選擇天線系統其第二低頻輻射體22所連接的第二開關52與第一反射單元41所連接的第三開關53導通時的5GHz操作頻段的輻射場型圖，其中虛線部分C2是圖3B的輻射場型，相比於圖3B的輻射場型(虛線部分C2)，第一反射單元41使在-X軸向與+Z軸向所涵蓋的象限的輻射強度被增強，如圖3D中箭頭所指的方向的輻射強度增強，也就是說，第一反射單元41使高頻共振模態所對應的輻射場型進一步朝向相對於第一反射單元41的方向偏移。另外，此時輻射場型中的天線增益最大處並沒有顯著變化，不做贅述。 Next, FIG. 3C is a radiation of a 5 GHz operating band when the first switch 51 connected to the first low frequency radiator 21 and the fourth switch 53 connected to the second reflection unit 42 are connected in the beam selective antenna system according to the embodiment of the present invention. The field pattern, in which the field pattern of the broken line portion C1 is the radiation pattern of FIG. 3A, it can be seen that the second reflection unit 42 makes the -X axis and the -Z axis compared to the radiation field type of FIG. 3A (dashed line portion C1). The radiation intensity to the quadrant covered is enhanced, and the radiation intensity in the direction indicated by the arrow in FIG. 3C is enhanced, that is, the second reflection unit 42 further aligns the radiation pattern corresponding to the high frequency resonance mode with respect to The direction of the second reflecting unit 42 is shifted. Next, referring to FIG. 3D, FIG. 3D is a 5 GHz when the second switch 52 connected to the second low frequency radiator 22 and the third switch 53 connected to the first reflection unit 41 are turned on according to the beam selection antenna system according to the embodiment of the present invention. The radiation pattern of the operating band, wherein the dotted portion C2 is the radiation pattern of FIG. 3B, and the first reflecting unit 41 is in the -X axis and the +Z axis compared to the radiation pattern of FIG. 3B (dashed portion C2) The radiation intensity to the quadrant covered is enhanced, and the radiation intensity in the direction indicated by the arrow in FIG. 3D is enhanced, that is, the first reflection unit 41 further aligns the radiation pattern corresponding to the high frequency resonance mode with respect to The direction of the first reflecting unit 41 is shifted. In addition, there is no significant change in the maximum antenna gain in the radiation pattern at this time, and no further description is made.

接著，在另一實施例中，請參照圖4，波束選擇天線系統除了圖1實施例的第一輻射單元2與第一反射單元41、第二反射單元42，更包括第二輻射單元6、第三反射單元43與第四反射單元44。第二輻射單元6垂直於接地面1且設置於接地面1的第二邊緣12，第二邊緣12與第一邊緣11彼此相對，也就是說第二輻射單元6與第一輻射單元2在接地面1的兩個邊緣(11、12)彼此相對。大體 上，第二輻射單元6的結構與原理相同於第一輻射單元2。第一輻射單元2、第一反射單元41與第二反射單元42配合電磁屏蔽罩3構成了第一組波束選擇機制，且第二輻射單元6、第三反射單元43與第四反射單元44配合電磁屏蔽罩3構成了對稱於第一組波束選擇機制的第二組波束選擇機制，這兩組波束選擇機制可達成輻射場型互補的效果。並且，使用兩組波束選擇機制不僅可應用於單輸入單輸出(Single Input and Single Output，SISO)系統，也可應用於多輸入多輸出(Multiple Input and Multiple Output，MIMO)系統。 Next, in another embodiment, referring to FIG. 4, the beam selection antenna system further includes a second radiation unit 6 in addition to the first radiation unit 2 and the first reflection unit 41 and the second reflection unit 42 of the embodiment of FIG. The third reflecting unit 43 and the fourth reflecting unit 44. The second radiating element 6 is perpendicular to the ground plane 1 and is disposed on the second edge 12 of the ground plane 1 . The second edge 12 and the first edge 11 are opposite to each other, that is to say the second radiating element 6 is connected to the first radiating element 2 . The two edges (11, 12) of the ground 1 are opposite each other. in general The structure and principle of the second radiating element 6 are the same as those of the first radiating element 2. The first radiating element 2, the first reflecting unit 41 and the second reflecting unit 42 cooperate with the electromagnetic shielding cover 3 to form a first group of beam selecting mechanisms, and the second radiating unit 6, the third reflecting unit 43 and the fourth reflecting unit 44 cooperate with the fourth reflecting unit 44. The electromagnetic shield 3 constitutes a second set of beam selection mechanisms that are symmetric to the first set of beam selection mechanisms, and the two sets of beam selection mechanisms achieve the complementary effect of the radiation pattern. Moreover, the use of two sets of beam selection mechanisms can be applied not only to single input and single output (SISO) systems, but also to multiple input and multiple output (MIMO) systems.

第二輻射單元6的詳細特徵如下所述，第二輻射單元6包括第二單極天線69、第三低頻輻射體61與第四低頻輻射體62。第二單極天線69設置於接地面1的第二邊緣12且與第一單極天線29彼此相對，且利用第二射頻饋入單元691以產生高頻共振模態，其中第二射頻饋入單元691設置於第二單極天線69與接地面1之間。第三低頻輻射體61位於第二單極天線69的左側，用以產生低頻共振模態，第三低頻輻射體61具有第三延伸部61e與第三接地部61g，第三延伸部61e用以耦合第二單極天線69，第三低頻輻射體61的第三接地部藉61g由第五開關55連接至接地面1。第四低頻輻射體62位於第二單極天線69的右側，用以產生低頻共振模態，第四低頻輻射體62具有第四延伸部62e與第四接地部62g，第四延伸部62g用以耦合第二單極天線69，第四低頻輻射體62的第四接地部62g藉由第六開關56連接至接地面1。第三反射單元43垂直設置於接地面1之上，且藉由第七開關57連接接地面1。第四反射單元44垂直設置於接地面1之上，且藉由第八開關58連接接地面1。再者，第二單極天線69、第三低頻輻射體61與第四低頻輻射體62可以垂 直於接地面1，以減少天線所佔用的空間，或者是以雷射直接成形(LDS)技術施作於機殼內側。第三低頻輻射體61的長度與第四低頻輻射體62的長度皆是低頻共振模態其頻率所對應的操作波長的四分之一，其中當第五開關55或第六開關56導通時，對應的第三低頻輻射體61或第四低頻輻射體62被導通至接地面1。第三反射單元43與第四反射單元44例如是片狀的金屬片或柱形導體，第三反射單元43與第四反射單元44的長度為第二單極天線69的高頻共振模態其頻率所對應的操作波長的四分之一，其中當第七開關57或第八開關58導通時，對應的第三反射單元43或第四反射單元44被導通至接地面1。另外，在圖4的實施例中的電磁屏蔽罩3是長方體的罩體，且電磁屏蔽罩3靠近接地面1的第二邊緣12的部分是一個垂直平面32，但本發明也不因此限定。 The detailed features of the second radiating element 6 are as follows, and the second radiating element 6 includes a second monopole antenna 69, a third low frequency radiator 61 and a fourth low frequency radiator 62. The second monopole antenna 69 is disposed on the second edge 12 of the ground plane 1 and opposite to the first monopole antenna 29, and utilizes the second RF feed unit 691 to generate a high frequency resonant mode, wherein the second RF feed is The unit 691 is disposed between the second monopole antenna 69 and the ground plane 1. The third low frequency radiator 61 is located on the left side of the second monopole antenna 69 for generating a low frequency resonance mode. The third low frequency radiator 61 has a third extension portion 61e and a third ground portion 61g, and the third extension portion 61e is used for The second monopole antenna 69 is coupled, and the third ground portion of the third low frequency radiator 61 is connected to the ground plane 1 by the fifth switch 55 by 61g. The fourth low frequency radiator 62 is located on the right side of the second monopole antenna 69 for generating a low frequency resonance mode, and the fourth low frequency radiator 62 has a fourth extension portion 62e and a fourth ground portion 62g, and the fourth extension portion 62g is used for The second monopole antenna 69 is coupled, and the fourth ground portion 62g of the fourth low frequency radiator 62 is connected to the ground plane 1 by the sixth switch 56. The third reflecting unit 43 is vertically disposed on the ground plane 1 and connected to the ground plane 1 via the seventh switch 57. The fourth reflecting unit 44 is vertically disposed above the ground plane 1 and connected to the ground plane 1 by the eighth switch 58. Furthermore, the second monopole antenna 69, the third low frequency radiator 61 and the fourth low frequency radiator 62 may be suspended Straight to ground plane 1 to reduce the space occupied by the antenna, or applied directly to the inside of the casing by laser direct structuring (LDS) technology. The length of the third low frequency radiator 61 and the length of the fourth low frequency radiator 62 are both one quarter of the operating wavelength corresponding to the frequency of the low frequency resonant mode, wherein when the fifth switch 55 or the sixth switch 56 is turned on, The corresponding third low frequency radiator 61 or fourth low frequency radiator 62 is electrically connected to the ground plane 1. The third reflecting unit 43 and the fourth reflecting unit 44 are, for example, sheet-like metal sheets or cylindrical conductors, and the lengths of the third reflecting unit 43 and the fourth reflecting unit 44 are high-frequency resonance modes of the second monopole antenna 69. A quarter of the operating wavelength corresponding to the frequency, wherein when the seventh switch 57 or the eighth switch 58 is turned on, the corresponding third reflecting unit 43 or fourth reflecting unit 44 is turned on to the ground plane 1. Further, the electromagnetic shield 3 in the embodiment of Fig. 4 is a rectangular parallelepiped cover, and the portion of the electromagnetic shield 3 adjacent to the second edge 12 of the ground plane 1 is a vertical plane 32, but the invention is not limited thereto.

接著，請再參照圖5A與圖5B的應用範例，圖1實施例的波束選擇天線系統例如應用於螢幕邊框，如圖5A所示的電視螢幕邊框附近的位置81、82、83，電視螢幕的內部電路板只需設置對應的電磁屏蔽罩，而且電磁屏蔽罩可用以保護電路信號避免受到天線的干擾。圖4實施例的具有兩組波束選擇機制的波束選擇天線系統則可應用於機上盒或無線路由器，如圖5B的內部電路板100的邊緣位置84、85，內部電路板100的中央處則設置電磁屏蔽罩300以覆蓋主要電路部分，但本發明並不因此限定。以下將說明圖4實施例的輻射場型。 Next, referring again to the application examples of FIG. 5A and FIG. 5B, the beam selection antenna system of the embodiment of FIG. 1 is applied, for example, to a screen frame, as shown in FIG. 5A, at positions 81, 82, and 83 near the frame of the television screen, on the television screen. The internal circuit board only needs to be provided with a corresponding electromagnetic shielding cover, and the electromagnetic shielding cover can be used to protect the circuit signal from interference by the antenna. The beam selective antenna system with two sets of beam selection mechanisms of the embodiment of FIG. 4 can be applied to a set-top box or a wireless router, such as the edge positions 84, 85 of the internal circuit board 100 of FIG. 5B, and the center of the internal circuit board 100. The electromagnetic shield 300 is provided to cover the main circuit portion, but the present invention is not limited thereto. The radiation pattern of the embodiment of Fig. 4 will be explained below.

接著，說明圖4實施例的低頻共振模態的輻射場型切換，圖6A是圖4的波束選擇天線系統其第五開關55導通時的2.4GHz操作頻段的輻射場型圖，圖6B是圖4的波束選擇天線系統其第六開 關56導通時的2.4GHz操作頻段的輻射場型圖。圖6A的輻射場型是(基於Z軸)對稱於圖2A的輻射場型，而圖6B的輻射場型是(基於Z軸)對稱於圖2B的輻射場型。因此，請參照圖6C，圖6C是圖4的波束選擇天線系統其2.4GHz操作頻帶的輻射場型切換的示意圖，可見輻射場型切換具有四種不同的方向，這四種切換模式分別受控於第一低頻輻射體21所連接的第一開關51、第二低頻輻射體22所連接的第二開關52、第三低頻輻射體61所連接的第五開關55與第四低頻輻射體62所連接的第六開關56。 Next, the radiation pattern switching of the low frequency resonant mode of the embodiment of FIG. 4 is illustrated. FIG. 6A is a radiation pattern diagram of the 2.4 GHz operating band when the fifth switch 55 of the beam selecting antenna system of FIG. 4 is turned on, and FIG. 6B is a diagram. 4 beam selective antenna system is sixth open The radiation pattern of the 2.4 GHz operating band when the 56 is turned on. The radiation pattern of Figure 6A is (based on the Z-axis) symmetric to the radiation pattern of Figure 2A, while the radiation pattern of Figure 6B is (based on the Z-axis) symmetric to the radiation pattern of Figure 2B. Therefore, please refer to FIG. 6C, which is a schematic diagram of the radiation field switching of the 2.4 GHz operating band of the beam selecting antenna system of FIG. 4. It can be seen that the radiation field switching has four different directions, and the four switching modes are respectively controlled. The first switch 51 connected to the first low-frequency radiator 21, the second switch 52 connected to the second low-frequency radiator 22, the fifth switch 55 and the fourth low-frequency radiator 62 connected to the third low-frequency radiator 61 The sixth switch 56 is connected.

接著說明圖4實施例的高頻共振模態的輻射場型切換，圖7A是圖4的波束選擇天線系統其第五開關55導通時的5GHz操作頻段的輻射場型圖，圖7A的輻射場型是(基於Z軸)對稱於圖3A的輻射場型。圖7B是圖4的波束選擇天線系統其第六開關56導通時的5GHz操作頻段的輻射場型圖，圖7B的輻射場型是(基於Z軸)對稱於圖3B的輻射場型。圖7C是圖4的波束選擇天線系統其第五開關55與第八開關58導通時的5GHz操作頻段的輻射場型圖，圖7C的輻射場型是(基於Z軸)對稱於圖3C的輻射場型。圖7D是圖4的波束選擇天線系統其第六開關56與第七開關57導通時的5GHz操作頻段的輻射場型圖，圖7D的輻射場型是(基於Z軸)對稱於圖3D的輻射場型。以上的場型切換情況以圖8來呈現，圖8是圖4的波束選擇天線系統其5GHz操作頻帶的輻射場型切換的示意圖，可見圖4實施例的波束選擇天線系統可以涵蓋X-Z平面個多種方向場型切換，可符合X-Z平面各種不同方向的輻射場型需求。基於以上對於一組波束選擇機制以及兩組波束選擇機制的說明，本發明所屬領域具有通常知識者可將本發明實施例的技術衍生至多組波束選擇機制的應用。 Next, the radiation pattern switching of the high frequency resonant mode of the embodiment of FIG. 4 is explained. FIG. 7A is a radiation field pattern of the 5 GHz operating band when the fifth switch 55 of the beam selecting antenna system of FIG. 4 is turned on, and the radiation field of FIG. 7A. The pattern is (based on the Z axis) symmetrical to the radiation pattern of Figure 3A. 7B is a radiation pattern of the 5 GHz operating band when the sixth switch 56 of the beam selective antenna system of FIG. 4 is turned on, and the radiation pattern of FIG. 7B is (based on the Z axis) symmetrical to the radiation pattern of FIG. 3B. 7C is a radiation pattern diagram of the 5 GHz operating band when the fifth switch 55 and the eighth switch 58 of the beam selective antenna system of FIG. 4 are turned on, and the radiation pattern of FIG. 7C is (based on the Z axis) symmetrical to the radiation of FIG. 3C. Field type. 7D is a radiation pattern diagram of the 5 GHz operating band when the sixth switch 56 and the seventh switch 57 of the beam selective antenna system of FIG. 4 are turned on, and the radiation pattern of FIG. 7D is (based on the Z axis) symmetrical to the radiation of FIG. 3D. Field type. The above field switching situation is presented in FIG. 8. FIG. 8 is a schematic diagram of the radiation field switching of the 5 GHz operating band of the beam selecting antenna system of FIG. 4. It can be seen that the beam selecting antenna system of the embodiment of FIG. 4 can cover multiple XZ planes. The directional field type switching can meet the radiation field requirements of various directions in the XZ plane. Based on the above description of a set of beam selection mechanisms and two sets of beam selection mechanisms, the art to which the present invention pertains can be applied to a plurality of sets of beam selection mechanisms by those of ordinary skill in the art.

綜上所述，本發明實施例所提供的波束選擇天線系統，為雙頻操作的波束選擇天線系統，利用兩個反射單元配合電磁屏蔽罩以實現高頻輻射場型切換，且利用兩個低頻輻射體的切換以實現低頻輻射場型切換，可達到多方向性輻射場型涵蓋的效果。並且，第一輻射單元僅需設置在接地面邊緣，可以顯著地節省天線系統在室內用無線通信裝置中所佔用的空間。並且，所述波束選擇天線系統的結構簡單、製造與組裝方便。再者，當使用兩組(或兩組以上的)波束選擇機制，可以輕易達到基於接地面所在的平面上的多種不同角度的輻射場型切換的功效，以符合各種角度的通信應用。 In summary, the beam selection antenna system provided by the embodiment of the present invention is a dual-frequency operation beam selection antenna system, which uses two reflection units to cooperate with an electromagnetic shielding cover to realize high frequency radiation field switching, and utilizes two low frequencies. The switching of the radiator to achieve low-frequency radiation field switching can achieve the effect covered by the multi-directional radiation field. Moreover, the first radiating element only needs to be disposed at the edge of the grounding surface, which can significantly save the space occupied by the antenna system in the indoor wireless communication device. Moreover, the beam selection antenna system has a simple structure and is convenient to manufacture and assemble. Furthermore, when two or more sets (or more than two sets) of beam selection mechanisms are used, the efficacy of a plurality of different angles of radiation pattern switching based on the plane on which the ground plane is located can be easily achieved to meet various angles of communication applications.

以上所述僅為本發明之實施例，其並非用以侷限本發明之專利範圍。 The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.