HIGH-POWER UPLINK AND DOWNLINK SWITCHING DEVICE, AND COMMUNICATION APPARATUS

The present application relates to a high-power uplink and downlink switching device and a communication apparatus. A radio frequency switch and a synchronization control module of the high-power uplink and downlink switching device cooperate, on the basis of a first radio frequency port, to complete uplink and downlink switching. A circulator has a first port connected to an output end of a power amplification module, a second port connected to a second radio frequency port, and a third port connected to a low-noise amplifier module via a first radio frequency switch. The third port is further connected to a high-power load resistor and a second radio frequency switch via a first microstrip line, so as to be separately grounded. A radio frequency impedance from a first end to a second end of the first microstrip line is in a high-impedance state. With the structure described above, downlink reflection power is absorbed by the high-power load resistor without affecting uplink. In addition, when the uplink is active, the radio frequency switches cooperate with a periodic change in impedance of the microstrip line to ensure that radio frequency power does not leak to the load resistor, thereby achieving TDD switching for high-power capacities, and overcoming device power capacity limits.