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Radio frequency transmitter open circuit protection circuit and method

A radio frequency transmitter, open circuit protection technology, applied in the field of data link communication, to achieve the effect of protecting electronic components

Inactive Publication Date: 2019-03-01
TIANJIN JINHANG COMP TECH RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The invention proposes a radio frequency transmitter open circuit protection circuit and method to solve the technical problem of how to perform open circuit protection and reduce device risk

Method used

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  • Radio frequency transmitter open circuit protection circuit and method
  • Radio frequency transmitter open circuit protection circuit and method

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Embodiment Construction

[0018] 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.

[0019] This embodiment proposes a radio frequency transmitter open circuit protection circuit and method, the circuit principle is as follows figure 2 shown. The open circuit protection circuit includes a push amplifier 1 , a final amplifier 2 , a 50-ohm high-power load 4 , a circulator 5 , a coupler 6 and a comparator 7 .

[0020] According to the signal flow direction, the radio frequency signal is amplified by the push amplifier 1 and the final amplifier 2 in sequence, and then output through the circulator 5 . When the RF output terminal is open, the RFout signal passes through the third port of the circulator 5 clockwise, and the reflected signal passes through the coupler 6 and then enters the 50-ohm high-power ...

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Abstract

The invention belongs to the technical field of data chain communication, and specifically relates to a radio frequency transmitter open circuit protection circuit and method. According to the circuitand method, a reflected radio frequency power signal can be detected under an open circuit or mismatching condition of an output end of a radio frequency transmitter, and through comparing a detection voltage value, an input signal of the radio frequency transmitter is rapidly pinched off. After the pinching off, detection is carried out to ensure that the output voltage is reduced, so as to restart an input signal and then carry out circulation. At the output end, abnormal pulse signals can be observed so that the average power output by a chain device can be reduced. A detection signal canbe uploaded to an upper computer for alarm, so as to achieve the aim of protecting electronic devices.

Description

technical field [0001] The invention belongs to the technical field of data link communication, and in particular relates to an open-circuit protection circuit and method for a radio frequency transmitter. Background technique [0002] With the continuous development of the information age, wireless communication technology is more and more widely used in radar, communication, electronic warfare, aerospace, satellite communication and other fields. High-performance, high-reliability wireless communication equipment has become a key research direction. As an important part of wireless communication, the radio frequency transmitter directly affects the performance of the wireless communication system. In order to ensure that the power supply and input signal of the RF transmitter will not be damaged under abnormal operating conditions such as wrong load connection, forgetting to connect the load, and load mismatch, it is necessary to add open circuit protection to the output ...

Claims

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Application Information

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IPC IPC(8): H04B1/04
CPCH04B1/0458H04B1/0466
Inventor 刘震
Owner TIANJIN JINHANG COMP TECH RES INST
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