Ultra-broadband impedance matched electrically small self-comple

Details Ultra-broadband impedance matched electrically small self-comple Ultra-broadband impedance matched electrically small self-comple

1987-09-16

1988-06-07

Sikes, William L.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343751, 343814, 343822, 343816, 343900, H01Q 2100

Patent

active

047500000

ABSTRACT:
Ultra-broadband impedance matched electrically small self-complementary pair antennas using thin wire elements with impedance inverting 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. Broadband impedance loci are achieved for thin radiators by impedance inverters placed prior to the complementarizing circuit. Impedance matching is then accomplished in a standard broadband hybrid or "Magic Tee" feed circuit.

REFERENCES:
patent: 3396398 (1968-08-01), Dunlavy
patent: 3449751 (1969-06-01), Schroeder
patent: 4213132 (1980-07-01), Davidson
patent: 4587525 (1986-05-01), Parsons

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