Radio frequency transmitting circuit
A technology of radio frequency transmission and radio frequency transmitter, applied in electrical components, transmission systems, etc., can solve the problems of single signal path, high power consumption of radio frequency transmitter, and low sensitivity of radio frequency receiving end, so as to improve the receiving sensitivity and reduce the bandwidth. The effect of external spurs
Inactive Publication Date: 2018-11-02
WUHAN XUNKANG ELECTRONICS TECH CO LTD
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Problems solved by technology
Since the signal path from the power amplifier input to the antenna is relatively single, the radio frequency transmission system is prone to failure due to local link failures; at the same time, the general radio frequency transmitter has high power consumption and the sensitivity of the radio frequency receiver is low, so it is difficult to detect radio frequency transmission The signal transmitted by the machine greatly reduces the efficiency of the radio frequency transmission system
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[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0024] Such as figure 1 As shown, a radio frequency transmission circuit of the present invention includes a radio frequency transmitter, a bandpass filter, a first power divider, a plurality of power amplifiers, a low pass filter, a power combiner, a second power divider, a plurality of Antenna switches, directional couplers, antenna tuners and antennas.
[0025] The band-pass filter transmits the signal within the freque...
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The invention provides a radio frequency transmitting circuit. Multiple power amplifiers, multiple antenna switches, a first power divider and a second power divider are arranged, so that output powerhigher than the output power of a single power amplifier circuit can be obtained, a single transmitting chain is changed into multiple transmitting chains, and the more are transmitting power amplifiers connected in parallel, the smaller influence of failure of part transmitting power amplifiers on the radio frequency transmitting circuit is; the more are the antenna switches connected in parallel, the wider coverage of a radio frequency transmitting signal is; a band-pass filter and a low pass filter are arranged, so that out-of-band stray is effectively reduced, and receiving sensitivity ofthe radio frequency transmitting circuit is improved; and an antenna tuner is arranged, so that the radio frequency transmitting circuit is impedance-matched with an antenna, and the antenna has maximum radiation power at any frequency.
Description
technical field [0001] The invention relates to the technical field of transmission for cable fault testing, in particular to a radio frequency transmission circuit. Background technique [0002] With the development of our country, the safety of cable lines is becoming more and more important, therefore, the cable fault test is very important. In the prior art, the cable fault testing method is to use a radio frequency transmitter to send a radio frequency signal directly to the faulty cable, and then a receiver receives the signal to analyze the fault point. Since the signal path from the power amplifier input to the antenna is relatively single, the radio frequency transmission system is prone to failure due to local link failures; at the same time, the general radio frequency transmitter has high power consumption and the sensitivity of the radio frequency receiver is low, so it is difficult to detect radio frequency transmission The signal transmitted by the machine gr...
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IPC IPC(8): H04B1/04
Inventor 荣德础刘新苏雁翔万兵
Owner WUHAN XUNKANG ELECTRONICS TECH CO LTD