Ultra-broadband impedance matched electrically small complementa

Details Ultra-broadband impedance matched electrically small complementa Ultra-broadband impedance matched electrically small complementa

1988-06-07

1990-09-18

Sikes, William L.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343713, H01Q 2100

Patent

active

049581678

ABSTRACT:
Ultra-broadband impedance matched electrically small complementary-pair antennas using thin wire elements with impedance optimizing feed are presented. Efficiencies are determined by achieveable loss resistances in the radiating structure itself, rather than the (limited) quality of an external loading coil; and by energy channeled into the difference port of the feed hybrid, that is used to match two complementary impedances. Broad and impedance loci are achieved for the thin radiators by horizontal feed bars placed prior to the complementarizing circuit. Impedance matching is then accomplished in a standard broadband hybrid or "Magic Tee" feed circuit, which combines either two identical elements, where one has been "complementarized", or there are twoself-complementary elements, such as a monopole and a half-loop.

REFERENCES:
patent: 4750000 (1988-06-01), Schroeder

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