Variable spacing inductance coil apparatus and method

Details Variable spacing inductance coil apparatus and method Variable spacing inductance coil apparatus and method

2007-02-13

2007-02-13

Mai, Anh (Department: 2832)

Communications: radio wave antennas

Antennas

With variable reactance for tuning antenna

C343S750000, C343S895000, C336S115000

Reexamination Certificate

active

10907640

ABSTRACT:
A variable inductance electrical device is an electrical conductor arranged in a flexible helical coil with a multiplicity of windings connected to a traveler plate and a fixed plate coaxially arranged a distance from the traveler plate. The conductor is arranged in the space between the traveler plate and the fixed plate such that moving the traveler plate away from the fixed plate moves the conductor coils apart and moving the traveler plate towards the fixed plate moves the conductor coils closer together. The inductance of the electrical coil varies inversely with the length of the coil, and thus varies with the spacing of the coils.

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Robert E. Snyder, An Efficient Tuner for Small 160 Meter Verticals (Apr. 2005), published in QST, the official journal of AARL, the national association for amateur radio, copies available from AARL Publication Sales Department, 225 Main Street, Newington, CT 06111-1494, 1-888-277-5289 (Inside USA) or 1-860-594-0355.

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