Patent ID: 6933802
Filing Date: 2005-08-23
Classification: H01P,H03K

Abstract:
1. A high frequency switch comprising: a first FET switch connected between an input and output (I/O) port and a transmission port; a strip line connected between said I/O port and a reception port, said strip line having an electrical length equivalent to ¼ wavelength of a high frequency signal input from said transmission port; a second FET switch whose one end is connected to said strip line and to a side of said reception port and the other end is ground; and a control port for controlling turning on and off of said first and second FET switches; wherein said strip line is formed in an inner layer of a dielectric multilayer board, wherein said first and second FET switches are mounted on a surface of said multilayer board as a high frequency device, and wherein a sharing device made by combining two SAW filters is connected to an end of said reception port, said sharing device being mounted on the surface of said multilayer board.