Portable telephone with microstrip antennas

Details Portable telephone with microstrip antennas Portable telephone with microstrip antennas

1996-07-15

1999-05-11

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 90, 4552771, H04B1/44

Patent

active

059038217

ABSTRACT:
In a portable telephone, a pair of microstrip antennas (1), (2) for signal reception and signal transmission with adjacent resonance frequencies different from each other are approximately arranged on the same plane at predetermined intervals. Accordingly, in the portable telephone, neither antenna becomes a hindrance when storing the portable telephone into a pocket of a coat, etc., and it is not necessary to operate the antenna at a signal receiving time, during calling time or after the operator is finished using the portable telephone.

REFERENCES:
patent: 4829591 (1989-05-01), Hashimoto et al.
patent: 4914714 (1990-04-01), Tamura
patent: 5203018 (1993-04-01), Hirose
patent: 5471146 (1995-11-01), Krayeski et al.
patent: 5495255 (1996-02-01), Komatsu et al.
patent: 5559838 (1996-09-01), Nakagoshi
patent: 5634200 (1997-05-01), Kitakubo et al.

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