Circularly polarized wave microstrip antenna and frequency adjus

Details Circularly polarized wave microstrip antenna and frequency adjus Circularly polarized wave microstrip antenna and frequency adjus

1992-07-30

1995-04-25

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

343828, H01Q 138

Patent

active

054103223

ABSTRACT:
In a circularly polarized wave microstrip antenna 1, a ground conductor 3 and a radiation conductor 2 are provided respectively on one surface and the other surface of a dielectric substrate 4 for feeding electric power to a feeding point P eccentrically provided on the radiation conductor 2. The radiation conductor 2 is provided with at least one projection 21a through 21d for adjusting the axial ratio at a position of an angle of 45.times.(2N+1).degree. (N: Integer) with respect to a reference line passing through a center point O and the feeding point P on the periphery thereof, and is provided with at least one frequency adjusting projection 22a through 22d at a position of an angle of 90 N.degree. (N: Integer) with respect to the reference line.

REFERENCES:
patent: 4316194 (1982-02-01), DeSantis et al.
Haneishi et al., "A Design of Back-Feed . . . " Electronics and Communications in Japan, vol. 64, No. 7, Jul. 1981, pp. 52-60.
Patent Abstracts of Japan, vol. 15, No. 250 (E(1082) 25 Jun. 1989 & JP A 30 080 603.

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