Tunable antenna circuit, particularly for contactless...

Details Tunable antenna circuit, particularly for contactless... Tunable antenna circuit, particularly for contactless...

2006-09-26

2006-09-26

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

With variable reactance for tuning antenna

C343S750000

Reexamination Certificate

active

07113139

ABSTRACT:
An antenna circuit tunable to a determined resonance frequency, includes an antenna coil and adjustable components. The antenna circuit includes a filter having at least one point to tap an electric voltage the amplitude of which forms a pertinent indication for the tuning of the antenna circuit. To tune the antenna circuit, the adjustable components of the antenna circuit are adjusted so that the electric voltage has a determined amplitude.

REFERENCES:
patent: 1742602 (1930-01-01), Kolster
patent: 2408826 (1946-10-01), Vogel
patent: 3010098 (1961-11-01), Pomeroy
patent: 6028503 (2000-02-01), Preishuberpflügl et al.
patent: 6070803 (2000-06-01), Stobbe
patent: 195 46 928 (1997-06-01), None
patent: 197 55 250 (1999-07-01), None
patent: 0 663 724 (1995-07-01), None

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