Wide-band loop antenna with outer and inner loop conductors

Details Wide-band loop antenna with outer and inner loop conductors Wide-band loop antenna with outer and inner loop conductors

1990-09-13

1993-03-30

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Plural separate diverse type

343713, 343742, H01Q 138, H01Q 2100

Patent

active

051988267

ABSTRACT:
A wide-band loop antenna consists of a main loop antenna conductor and a sub-loop antenna conductor. The main loop antenna conductor is provided on a dielectric plate to extend from one terminal of a pair of feed terminals to another one of the terminals so as to form a one-turn open loop. The loop antenna conductor is provided on the dielectric plate so as to extend along the main antenna conductor to provide a one-turn open loop and is connected to the pair of feed terminals to constitute a synthesized antenna together with the main antenna conductor. Short-circuting conductors are provided to connect the main antenna conductor with the sub-antenna conductor for shifting a resonance frequency of the synthesized antenna outside the operating band to obtain a wide-band frequency characteristic. In a modification, the sub-antenna conductor forms a closed loop serving as a parasitic antenna which improves an impedance characteristic of the main antenna conductor.

REFERENCES:
patent: 3096518 (1963-07-01), Tiikkainen
patent: 4003056 (1977-01-01), Davis
patent: 4160977 (1979-07-01), Davis
patent: 4331961 (1982-05-01), Davis
patent: 4701764 (1987-10-01), Malcombe
patent: 4872018 (1989-10-01), Feltz et al.

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