Radio frequency front end circuit for monitoring broadband satellite signal
A satellite signal, radio frequency front-end technology, applied in the field of radio frequency front-end, can solve the problems of complex structure and high cost of instruments and devices
Inactive Publication Date: 2015-04-08
GUANGZHOU GRG METROLOGY & TEST CO LTD +1
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Problems solved by technology
[0003] At present, the main technical means for satellite channel spectrum monitoring in the field of satellite communications is mainly to use spectrum analyzers. The disadvantages of this type of spectrum analyzer are high cost and complex structure of instruments and devices.
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[0013] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0014] Such as figure 1 As shown, it is a schematic structural diagram of a radio frequency front-end circuit for satellite signal monitoring in a preferred embodiment of the present invention, including:
[0015] Including analog power detection circuit, secondary frequency conversion circuit and programmable gain circuit, and circuit space separation cavity;
[0016] The analog power detection circuit includes a digital threshold comparison circuit (V1, V2 and V3) and a logarithmic detector 111 connected in sequence;
[0017] The secondary frequency conversion circuit includes a variable local oscillator circuit LO1, a first mixer 121, a first bandpass filter 122, a second bandpass filter 123, a second mixer 124, a fixed local oscillator circuit LO2 and a third bandpass ...
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The invention provides a radio frequency front end circuit for monitoring a broadband satellite signal. The radio frequency front end circuit comprises a simulating power detection circuit, a double conversion circuit, a program control gain circuit and a circuit space separating cavity, wherein the simulating power detection circuit comprises a digital threshold comparison circuit and a logarithm detector which are connected with each other in turn; the double conversion circuit comprises a variable local oscillator frequency mixer circuit, a first frequency mixer, a first band-pass filter, a second band-pass filter, a second frequency mixer, a fixed local oscillator frequency mixer circuit and a third band-pass filter which are connected with each other in turn; the program control gain circuit comprises a first numerical control attenuator, a first fixed amplifier and a second fixed amplifier which are connected with each other in turn; the second fixed amplifier is connected with the third band-pass filter; the logarithm detector is connected with the first frequency mixer; the second frequency mixer is connected with the first numerical control attenuator. The radio frequency front end circuit provided by the invention is simple in structure and low in cost and is used for automatically performing gain control on the satellite signal.
Description
technical field [0001] The invention relates to the field of radio frequency front-end technology, in particular to a radio frequency front-end circuit for broadband satellite signal monitoring. Background technique [0002] As my country's comprehensive strength in the high-tech field continues to increase, the number of satellites in orbit that can be used is increasing, the capacity of satellite transponders is increasing, and the application range of satellite communications is becoming wider and wider. The following problems are , due to the existence of a large number of communication terminals, higher requirements are put forward for the effective use of satellite transponders. If the allocation and use of spectrum resources is unreasonable, mutual interference between communication terminals will easily occur, which will reduce the reliability and stability of communication. Satellite communication users need an effective satellite spectrum monitoring method to grasp ...
Claims
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Login to View More IPC IPC(8): H04B1/00H04B1/40H04B17/13H03G3/20
Inventor 肖志力年夫清陆婷婷高红佳曾昕
Owner GUANGZHOU GRG METROLOGY & TEST CO LTD