Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1997-06-12
2000-02-15
Bost, Dwayne D.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
455 83, 455121, 4551931, H04B 144
Patent
active
06026280&
ABSTRACT:
In an antenna matching circuit switching system of a portable telephone, an antenna transmits a transmission signal and receives a reception signal in form of electromagnetic wave. A receiving section receives the reception signal from the antenna and a transmission section supplies the antenna with the transmission signal having a first frequency which is different from a second frequency of the reception signal. A transmission and reception switching section connects the antenna to the receiving section in response to a reception control signal and to the transmission section in response to a transmission control signal. A first antenna matching circuit is matched to the antenna in the second frequency, and a second antenna matching circuit is matched to the antenna in the first frequency. An antenna matching circuit switching section connects the antenna to the first antenna matching circuit in response to the reception control signal and to the second antenna matching circuit in response to the transmission control signal. A control section selectively issues the reception control signal and the transmission control signal to the transmission and reception switching section and the antenna matching circuit switching section.
REFERENCES:
patent: 4637073 (1987-01-01), Selin et al.
patent: 5193218 (1993-03-01), Shimo
patent: 5442812 (1995-08-01), Ishizaki et al.
patent: 5477532 (1995-12-01), Hoshigami et al.
patent: 5515364 (1996-05-01), Fague
patent: 5521561 (1996-05-01), Yrjola et al.
patent: 5544224 (1996-08-01), Jonsson et al.
patent: 5754141 (1998-05-01), Thompson et al.
patent: 5768690 (1998-06-01), Yamada et al.
patent: 5784687 (1998-07-01), Itoh et al.
patent: 5789995 (1998-08-01), Minasi
Bost Dwayne D.
NEC Corporation
Vuong Quochien B.
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