Patent ID: 7596357

Claim:
A high-frequency switching circuit arranged between a common antenna terminal and a transmission system and/or a reception system of a plurality of communication systems having different frequency bands or different communication methods, the circuit comprising: two or more high-frequency switches provided correspondingly to the plurality of communication systems, each of the high-frequency switches having one antenna side terminal and two or more transmitting and/or receiving terminals; a control circuit adapted to control switching of the two or more high-frequency switches; and a matching circuit capable of allowing passage of direct current and provided between antenna side terminals of the respective two or more high-frequency switches and the common antenna terminal, and wherein the antenna side terminals of the two or more high-frequency switches are connected to each other in a manner capable of allowing passage of direct current via the matching circuit, and the control circuit is adapted to control in such a manner that when one path through one of the transmitting and/or receiving terminals of any of the high-frequency switches is turned on, the other paths of the high-frequency switch and all paths of the other high-frequency switches are turned off.