Patent ID: 7171234
Filing Date: 2007-01-30
Classification: H01P,H04B

Abstract:
1. A high-frequency switch circuit for switching a connection between a common transmission circuit and an antenna side circuit in a plurality of transmitting and receiving systems, a connection between said antenna side circuit and a reception circuit in one of said plurality of transmitting and receiving systems, and a connection between said antenna side circuit and a reception circuit in the other of said plurality of transmitting and receiving systems, said high-frequency switch circuit comprises a first diode connected between said common transmission circuit and said antenna side circuit; a first distributed constant line connected to said antenna side circuit; a second diode connected to a ground at the other side of said first distributed constant line; a capacitor connected in series to said first distributed constant line; a third diode connected between said capacitor and said reception circuit in one of said plurality of transmitting and receiving systems; a second distributed constant line connected between said capacitor and said reception circuit in the other of said plurality of transmitting and receiving systems; and a fourth diode connected to a ground at said reception circuit of said second distributed constant line, wherein said first distributed constant line is connected to the anode side of said first diode and the cathode side of said second diode, an a first control circuit is connected to the anode side of said second diode.