Radio frequency transmitting circuit, bidirectional coupler and directional coupler
A directional coupler and two-way coupling technology, which is applied in transmitter monitoring, electrical components, transmission monitoring, etc., can solve problems such as the complex structure of the two-way coupler, and achieve the effect of simple structure, low insertion loss, and easy integration
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[0049] see Figure 5 , which is a simplified schematic diagram of the RF transceiver circuit of this application, which can be split into Figure 5a The RF transmit circuit of this application is shown and Figure 1b Existing RF receiver circuit shown. The radio frequency transceiver 11 may be replaced by an independent radio frequency transmitter 11 a and a radio frequency receiver 11 b , and the combination of the radio frequency transmitter 11 a and the radio frequency receiver 11 b may also be replaced by the radio frequency transceiver 11 .
[0050] see Figure 5a , the radio frequency transmitting circuit of the present application includes a radio frequency transmitter 11 a , a transmitting channel element 13 , an antenna switch 15 , a bidirectional coupler 21 , an antenna tuner 23 and an antenna 17 . Among them, the transmit channel element 13 includes, for example, a radio frequency power amplifier, a filter, a duplexer, etc., and is mainly used for amplifying and ...
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