Variable type antenna matching circuit

Details Variable type antenna matching circuit Variable type antenna matching circuit

2005-04-26

2005-04-26

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C343S702000

Reexamination Certificate

active

06885353

ABSTRACT:
A variable type antenna matching circuit includes an antenna, shape change detecting section, transmission/reception radio section, and variable type antenna matching section. The shape change detecting section detects a change in the shape of the housing of a portable terminal. The transmission/reception radio section transmits and receives signals. The variable type antenna matching section changes the input impedance between the antenna and the transmission/reception radio section in accordance with an output signal from the shape change detecting section.

REFERENCES:
patent: 5335368 (1994-08-01), Tamura
patent: 6223051 (2001-04-01), Rikihisa
patent: 0518526 (1992-12-01), None
patent: 1 510 755 (1978-05-01), None
patent: 2 178 616 (1987-02-01), None
patent: 2 205 995 (1988-12-01), None
patent: 2 293 276 (1996-03-01), None
patent: 2 366 956 (2002-03-01), None
patent: 2001-345882 (2001-12-01), None
patent: WO 9637967 (1996-11-01), None

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