Antenna selection switch for a diversity antenna

Details Antenna selection switch for a diversity antenna Antenna selection switch for a diversity antenna

1991-01-07

1994-01-04

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

Diversity

455129, 4552771, 455282, 455289, H04B 702

Patent

active

052769208

ABSTRACT:
The invention relates to a circuitry by means of which it is possible to switch to a mobile telephone that antenna out of two or more antennae which has the best signal, without substantial alterations in the mobile telephone itself. According to the invention, the antennae (A, B), the antenna selection switch (2) and the peripheral circuits (5, 6) connected to it constitute an integrated part which is separate from the actual mobile telephone (1) but can be coupled to it by means of an antenna cable (3), and the antenna cable (3) is coupled to the radio part of the mobile telephone (1) by mediation of a signal combining circuit (4) which transfers to the antenna cable (3) the supply voltage (V) and the antenna selection switch (2) control pulse, and transfers and selects the RF signal.

REFERENCES:
patent: 4984296 (1991-01-01), Schotz
patent: 5170493 (1992-12-01), Roth

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