Communications: radio wave antennas – Antennas – With variable reactance for tuning antenna
Reexamination Certificate
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.
Bill & Mary Lou Inc.
Keyworth William
Mai Anh
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