Antenna diversity system and method for operating said system

Telecommunications – Transmitter – Diversity

Reexamination Certificate

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C455S277100

Reexamination Certificate

active

10523389

ABSTRACT:
The invention relates to an antenna diversity comprising a first and a second antenna element where the first antenna element is operated in an active mode whereas the second antenna element is operated in a parasitic mode. The present invention minimizes the amount of mismatch while still being able to maximize a predetermined signal quality criterion for the electromagnetic signal on the active path between the first antenna element and the transceiver. By providing a pre-selection unit130as well as a selection unit140for selecting an optimal adjustable impedance connected to the second antenna ensuring that the amount of said mismatch is below a predetermined threshold value and that simultaneously a predetermined quality criterion for the transceived electromagnetic signal is fulfilled best within the range determined by the allowable mismatch. The invention further relates to a method for operating such an antenna diversity.

REFERENCES:
patent: 6049310 (2000-04-01), Sadahiro
patent: 6211830 (2001-04-01), Monma et al.
patent: 6657595 (2003-12-01), Phillips et al.
patent: 6917338 (2005-07-01), Bergervoet et al.
patent: 2002/0025793 (2002-02-01), Meijer et al.
M. Hamer, et al.; Experimental Vehicular Angle-Diversity Antenna Using Mutual Coupling; vol. 2; Jul. 1992 pp. 1089-1092;.

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