Reactance buffered loop antenna and method for making the same

Details Reactance buffered loop antenna and method for making the same Reactance buffered loop antenna and method for making the same

1990-08-27

1992-07-07

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Body-attached or connected

343744, 343868, 333 24R, H01Q 700

Patent

active

051286866

ABSTRACT:
A reactance buffer maintains a substantially constant reasonant frequency for an adjustable size loop antenna having first and second antenna segments. Each segment has first and second ends, the first ends being coupled to a receiver, and the second ends providing loop size adjustment. The reactance buffer comprises a reactance buffer input coupled to the second end of the first antenna segment. A plurality of taps are linearly disposed along a longitudinal axis of the first wristband section, and has a predetermined length between the outermost taps corresponding to the loop antenna size adjustment required. The taps provide selectable reactance buffer outputs for coupling to the second end of the second antenna segment. A plurality of reactance elements are arranged non-serially and couple the reactance buffer input to each of the plurality of taps and provide a substantially constant reactance measured between the reactance buffer input and each of the plurality of taps.

REFERENCES:
patent: 4201960 (1980-05-01), Skutta et al.
patent: 4518965 (1985-05-01), Hidaka
patent: 4713808 (1987-12-01), Gaskill et al.
patent: 4922260 (1990-05-01), Gaskill et al.

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