CN201328153Y - Multifunctional KU frequency band satellite receiving tuner and corresponding receiving device - Google Patents

The utility model relates to a tuner and corresponding receiving arrangement are received to multi-functional KU frequency channel satellite. Existing tuners do not receive low frequency broadcast television signals. Therefore, the multifunctional KU frequency band satellite receiving tuner comprises a feed source and a tuner circuit component. The high-pass filter is characterized by further comprising an outdoor broadcast television antenna signal input end, a 950-plus-2150 MHz high-pass filter is arranged between the intermediate frequency amplifier and the output end of the high-frequency head, and the outdoor broadcast television antenna signal input end is connected with the output end of the high-frequency head through a 47-862 MHz low-pass filter. The utility model discloses still relate to a corresponding receiving arrangement, including aforementioned multi-functional KU frequency channel satellite signal reception tuner and wave separator. The multifunctional KU frequency band satellite receiving tuner can directly receive analog or digital television signals sent by a KU frequency band transponder of a geosynchronous satellite, and can be used for watching common cable television programs if the analog or digital television signals are supplied to broadcast television signals.

多功能KU频段卫星接收高频头和相应接收装置 Multifunctional KU frequency band satellite receiving tuner and corresponding receiving device

技术领域 technical field

本实用新型属于无线广播电视、卫星广播电视和卫星通讯技术领域，具体地说涉及一种多功能KU频段卫星接收高频头和可兼容无线广播电视信号和KU频段卫星电视信号的接收装置。The utility model belongs to the technical field of wireless broadcast television , satellite broadcast television and satellite communication, in particular to a multifunctional KU frequency band satellite receiving tuner and a receiving device compatible with wireless broadcast television signals and KU frequency band satellite television signals.

背景技术 Background technique

常规的高频头只能接收10.7-12.75GHz频段的卫星电视信号。Conventional tuners can only receive satellite TV signals in the 10.7-12.75GHz band.

如果用户想在接收卫星电视信号的基础上，也接收低频广播电视信号，就要另外安装室外天线，并将该室外天线接入室内，十分麻烦。If the user wants to receive low-frequency broadcast TV signals on the basis of receiving satellite TV signals, he needs to install an outdoor antenna and connect the outdoor antenna indoors, which is very troublesome.

实用新型内容 Utility model content

本实用新型的技术问题是如何克服现有高频头不能接收低频广播电视信号缺陷，提供一种多功能KU频段卫星接收高频头和相应接收装置，带外抑制达到或大于30dB，两种信号互不干扰。The technical problem of the utility model is how to overcome the defect that the existing tuner cannot receive low-frequency radio and television signals, and provide a multifunctional KU frequency band satellite receiving tuner and corresponding receiving device, the out-of-band suppression reaches or exceeds 30dB, and the two kinds of signals Do not interfere with each other.

为解决上述技术问题，本多功能KU频段卫星接收高频头，包括馈源、高频头电路组件，其中高频头电路组件包括低噪声宽带放大器、功率分配器、镜象抑制带通滤波器、双本振振荡器、平衡混频器、中频放大器和控制电路，其特征在于：其还包括室外广播电视天线信号输入端，中频放大器与高频头输出端之间设有950-2150MHz的高通滤波器，室外广播电视天线信号输入端通过47-862MHz的低通滤波器与高频头输出端相接。In order to solve the above technical problems, the multifunctional KU frequency band satellite receiving tuner includes a feed source and a tuner circuit assembly, wherein the tuner circuit assembly includes a low-noise broadband amplifier, a power divider, and an image suppression bandpass filter , dual local oscillators, balanced mixers, intermediate frequency amplifiers and control circuits, characterized in that: it also includes an outdoor radio and television antenna signal input end, and a 950-2150MHz high-pass is provided between the intermediate frequency amplifier and the output end of the tuner. Filter, the outdoor radio and television antenna signal input terminal is connected to the tuner output terminal through a 47-862MHz low-pass filter.

使用时，来自卫星转发器的射频信号经高频头降频、放大后，经950-2150MHz高通滤波器滤波，得到纯净的高频卫星电视信号，室外天线接收到的无线广播电视信号与高频卫星电视信号叠加后，一同传入室内，最后，由分波器将两种信号分离后，供给电视机。(47-862MHz低通滤波器和950-2150MHz高通滤波器的带外抑制都达到或大于30dB，所以它们之间基本没有干扰，可在同一信号线上传输)When in use, the radio frequency signal from the satellite transponder is down-frequency and amplified by the tuner, and then filtered by a 950-2150MHz high-pass filter to obtain a pure high-frequency satellite TV signal. The wireless broadcast TV signal received by the outdoor antenna and the high-frequency After the satellite TV signals are superimposed, they are transmitted into the room together. Finally, the two signals are separated by a wave splitter and supplied to the TV. (The out-of-band rejection of the 47-862MHz low-pass filter and the 950-2150MHz high-pass filter both reach or exceed 30dB, so there is basically no interference between them, and they can be transmitted on the same signal line)

如此设计，用户只用一条信号线就可以将卫星电视信号和无线广播电视信号接入室内，结构简单、连接方便、成本低。With such a design, users can connect satellite TV signals and wireless broadcast TV signals indoors with only one signal line, which has simple structure, convenient connection and low cost.

作为优化，输出端有两个或两个以上。如此设计，可以为两台或两台以上电视机提供信号。As an optimization, there are two or more outputs. This design can provide signals for two or more TV sets.

本实用新型还涉及一种可兼容无线广播电视信号和KU频段卫星电视信号的接收装置，包括高频头，其特征在于：所述高频头为前述多功能KU频段卫星信号接收高频头，该高频头与电视机之间设有分波器，该分波器的输入端与高频头的输出端相接，其输出端有两个，分别输出47-862MHz的低频无线广播电视信号和950-2150MHz的高频卫星电视信号。47-862MHz低频无线广播电视信号可直接输入电视机，950-2150MHz的高频卫星信号需经卫星接收机处理后，再输入电视机。The utility model also relates to a receiving device compatible with wireless broadcast television signals and satellite television signals in the KU frequency band, including a tuner, characterized in that: the tuner is the aforementioned multifunctional tuner for receiving satellite signals in the KU frequency band, There is a wave splitter between the tuner and the TV set, the input end of the wave splitter is connected with the output end of the tuner, and there are two output ends, which respectively output 47-862MHz low-frequency radio and television signals And 950-2150MHz high frequency satellite TV signal. The 47-862MHz low-frequency wireless broadcast TV signal can be directly input into the TV set, and the 950-2150MHz high-frequency satellite signal needs to be processed by the satellite receiver before being input into the TV set.

本实用新型提供的Ku频段高频头是一种双极性、双本振(9.75GHZ和10.6GHZ)，双输出的降频器，它与抛物面天线和卫星电视接收机组合在一起，构成卫星电视地球接收站，可以直接接收地球同步卫星Ku频段转发器发出的模拟或数字电视信号，如果供给广播电视信号，还可以用来观看普通的有线电视节目。The Ku-band tuner provided by the utility model is a dual-polarity, dual local oscillator (9.75GHZ and 10.6GHZ), dual-output downconverter, which is combined with a parabolic antenna and a satellite TV receiver to form a satellite The TV earth receiving station can directly receive the analog or digital TV signal sent by the Ku-band transponder of the geosynchronous satellite. If the broadcast TV signal is supplied, it can also be used to watch ordinary cable TV programs.

附图说明Description of drawings

下面结合附图对本多功能KU频段卫星接收高频头和相应接收装置作进一步说明：The following is a further description of the multifunctional KU frequency band satellite receiving tuner and the corresponding receiving device in conjunction with the accompanying drawings:

图1是现有Ku频段卫星接收高频头的原理方框图；Fig. 1 is a schematic block diagram of an existing Ku-band satellite receiving tuner;

图2是本多功能Ku频段卫星接收高频头的原理方框图；Fig. 2 is the principle block diagram of this multifunctional Ku frequency band satellite receiving tuner;

图3是图2中A部分的具体电路图；Fig. 3 is the specific circuit diagram of part A in Fig. 2;

图4是本可兼容无线广播电视信号和KU频段卫星电视信号的接收装置的使用状态结构示意图。Fig. 4 is a schematic structural diagram of the use state of the receiving device compatible with wireless broadcast television signals and KU-band satellite television signals.

图中：1为室外广播电视天线信号输入端、2为高通滤波器、3为低通滤波器、LNB1、LNB2分别高频头的输出端、4为分波器、5为电视机、6为卫星接收机、7为碟形卫星天线、8为室外广播电视天线。In the figure: 1 is the signal input terminal of the outdoor radio and TV antenna, 2 is the high-pass filter, 3 is the low-pass filter, LNB1 and LNB2 are the output terminals of the tuner respectively, 4 is the wave splitter, 5 is the TV set, 6 is the Satellite receiver, 7 is a dish satellite antenna, 8 is an outdoor radio and television antenna.

具体实施方式 Detailed ways

实施方式一：如图2、3所示，本多功能KU频段卫星接收高频头包括馈源、高频头电路组件，其中高频头电路组件包括低噪声宽带放大器、功率分配器、镜象抑制带通滤波器、双本振振荡器、平衡混频器、中频放大器和控制电路，其特征在于：其还包括室外广播电视天线信号输入端1，中频放大器与高频头输出端之间设有950-2150MHz的高通滤波器2，室外广播电视天线信号输入端1通过47-862MHz的低通滤波器3与高频头的输出端相接。Embodiment one: as shown in Figure 2, 3, this multifunctional KU frequency band satellite receiving tuner comprises feed source, tuner circuit assembly, wherein tuner circuit assembly comprises low-noise broadband amplifier, power divider, mirror image Suppression band-pass filter, double local oscillator, balanced mixer, intermediate frequency amplifier and control circuit are characterized in that: it also includes an outdoor radio and television antenna signal input terminal 1, and an intermediate frequency amplifier and a tuner output terminal are provided There is a 950-2150MHz high-pass filter 2, and the outdoor radio and television antenna signal input terminal 1 is connected to the output terminal of the tuner through a 47-862MHz low-pass filter 3.

图2-3中高频头的输出端有两个，分别为LNB1、LNB2，相应地高通滤波器2和低通滤波器3也有两大套(当然也可以更多)。In Figure 2-3, there are two output ports of the LNB, which are LNB1 and LNB2, and correspondingly there are two sets of high-pass filter 2 and low-pass filter 3 (of course, there can be more).

图3中：高通滤波器2、低通滤波器3均为椭圆型滤波器，其带外抑制都可达到或大于30dB。其中L14、L15、L20、L16、L17、L22为微带电感，其中L15、L16：W＝0.33MM，L＝20MM；L14、L17：W＝0.28MM，L＝20MM；L20、L22：W＝0.25MM，L＝18MM；微带线误差均为±0.0254MM。In Fig. 3: the high-pass filter 2 and the low-pass filter 3 are both elliptic filters, and their out-of-band suppression can reach or exceed 30dB. Among them, L14, L15, L20, L16, L17, and L22 are microstrip inductors, among which L15, L16: W=0.33MM, L=20MM; L14, L17: W=0.28MM, L=20MM; L20, L22: W= 0.25MM, L=18MM; microstrip line error is ±0.0254MM.

实施方式二：如图4所示：本可兼容无线广播电视信号和KU频段卫星电视信号的接收装置包括高频头，其特征在于：所述高频头为实施方式一所述多功能KU频段卫星信号接收高频头，该高频头与电视机之间设有分波器4，该分波器4的输入端与高频头的输出端相接，该分波器4输出端有两个，分别输出47-862MHz的低频无线广播电视信号和950-2150MHz的高频卫星电视信号。Embodiment two: as shown in Figure 4: this receiving device that can be compatible with wireless broadcast television signal and KU frequency band satellite television signal comprises tuner, it is characterized in that: described tuner is the described multifunctional KU frequency band of embodiment one The satellite signal receiving tuner is provided with a wave splitter 4 between the tuner and the TV set, the input end of the wave splitter 4 is connected with the output end of the tuner, and the output end of the wave splitter 4 has two One, respectively output 47-862MHz low-frequency wireless broadcast TV signal and 950-2150MHz high-frequency satellite TV signal.

其中47-862MHz低频无线广播电视信号直接输入电视机5，950-2150MHz的高频卫星信号经卫星接收机6处理后输入电视机5。Among them, the 47-862MHz low-frequency wireless broadcast television signal is directly input into the TV set 5, and the 950-2150MHz high-frequency satellite signal is input into the TV set 5 after being processed by the satellite receiver 6.

高频头安装在碟形卫星天线7的上，并将其室外广播电视天线信号输入端1与室外广播电视天线8相接。The tuner is installed on the dish satellite antenna 7, and its outdoor broadcast TV antenna signal input terminal 1 is connected with the outdoor broadcast TV antenna 8.