RADIO TRANSMITTER-RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a transmitter-receiver capable of efficiently performing transmission and reception in a TDD method with a relatively simple configuration even when used with large power. SOLUTION: A circulation is used in the feeding part of an antenna shared for both transmission and reception. Particularly if transmission power becomes large, a switch is provided between the circulator and a receiving amplifier to interrupt the connection between the circulator and the receiving amplifier when transmission is performed.