Radio frequency transmitter refined standing-wave protecting circuit and method

A technology of radio frequency transmitter and protection circuit, which is applied in the field of data link communication to achieve the effects of improving the performance of the terminal, lowering the withstand power and increasing the recovery time.

Active Publication Date: 2019-01-11
TIANJIN JINHANG COMP TECH RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention proposes a refined standing wave protection circuit and method for a radio frequency transmitter to solve the technical problem of how to improve the fineness of standing wave protection

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  • Radio frequency transmitter refined standing-wave protecting circuit and method
  • Radio frequency transmitter refined standing-wave protecting circuit and method

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Embodiment Construction

[0023] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment proposes a refined standing wave protection circuit and method for a radio frequency transmitter. The principle of the circuit is as follows figure 2 shown. The circuit includes a power amplifier 1, a forward coupler 2, a first isolator 3, a cavity filter 4, an antenna 5, a second isolator 6, a bridge 7, a limiter 8, a detector 9, and a reverse coupling device 10 and low noise amplifier 11.

[0025] According to the signal flow direction, the radio frequency signal passes through the power amplifier 1, the forward coupler 2, the first isolator 3, and the cavity filter 4 in sequence, and then directly radiates out through the antenna 5, and the signal link loss is relatively low. figure 1 There ...

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Abstract

The present invention belongs to the technical field of data chain communication, especially relates to a radio frequency transmitter refined standing-wave protecting circuit and method suitable for radio frequency front-end module portions in a data chain end machine. An emitting output end of a power amplifier at the radio frequency front end is configured to perform power signal forward coupling and the radio frequency signals are subjected to positive detection to monitor the output of the radio frequency signals; one end of a bridge of a receiving end (the received radio frequency signalsare subjected to processing through a cavity filter, an isolator and the bridge and enter a power division limiter) of the radio frequency front end is connected with a detector to perform reflectionpower signal detection to detect the intensity of the reflection signals. Through comparison of voltages of positive and negative detectors, the reflection signal intensities of the antenna port in different standing-wave values are determined to adopt corresponding circuit protection measures. The radio frequency transmitter refined standing-wave protecting circuit and method cannot lose the positive power at the output end of the emitting chain, and when the standing wave is 5 or in a worse condition, the bearing power of the receiving end limiter is small and the limiter recovery time is increased so as to effectively improve the end machine performances.

Description

technical field [0001] The invention belongs to the technical field of data link communication, and in particular relates to a refined standing wave protection circuit and method for a radio frequency transmitter suitable for a radio frequency front-end component part of a data link terminal machine. Background technique [0002] In the information age, wireless communication technology is widely used and is changing with each passing day. The application of wireless equipment in radar, electronic warfare, aerospace, satellite communication and weaponry is becoming more and more extensive. In order to achieve a longer communication distance, wireless communication equipment with high performance and high power output has increasingly become the focus of designers. . RF front-end components and antennas are important components of data link communication, and their performance directly affects the overall performance of the data link terminal. Ideally, the standing wave bet...

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Application Information

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IPC IPC(8): H04B1/04
CPCH04B1/04H04B2001/0408
Inventor 刘震
Owner TIANJIN JINHANG COMP TECH RES INST
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