Portable radio transceiver system having improved adaptor and/or

Details Portable radio transceiver system having improved adaptor and/or Portable radio transceiver system having improved adaptor and/or

1990-08-13

1993-11-09

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455127, 4552771, H04B 138

Patent

active

052611213

ABSTRACT:
In order to enable a diversity reception in a portable radiotelephone without detrimentally increasing the size and weight thereof, an adaptor to which diversity antennas are coupled and into which the radiotelephone is inserted in an in-car mode, is provided with a diversity switch and a diversity switch controller. The portable radiotelephone is arranged to switch over from its own antenna to the diversity antennas upon insertion into the adaptor. The portable radiotelephone is further provided with an arrangement for exhibiting a correct receive signal strength irrespective of the fact it is set in the adaptor or used in a portable mode.

REFERENCES:
patent: 4641366 (1987-07-01), Yokoyama
patent: 4673861 (1987-06-01), Dubovsky et al.
patent: 4829591 (1989-05-01), Hashimoto et al.
patent: 4914714 (1990-04-01), Tamura
patent: 4939788 (1990-07-01), Hasegawa
patent: 4962523 (1990-10-01), Tanaka

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