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.
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[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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