Microstrip antenna

Details Microstrip antenna Microstrip antenna

1993-04-26

1999-09-21

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

H01Q 138

Patent

active

059559942

ABSTRACT:
A patch array microwave antenna comprising spaced sub-arrays each consisting of a patch and at least a pair of parasitic patches fed from the non-radiating edges of the fed patch. In a second embodiment a second pair of parasitic patches fed from the radiating edges are also provided so as to form a five-member cross. Spacings between patches in a group are kept to below .lambda./15, and groups spaced apart by at least double this. Intergroup distances P are kept below 2.lambda., but may be greater than .lambda. if alternate lines of patches are staggered by P/2 so no on-axis diffraction lobes appear in the radiation pattern.

REFERENCES:
patent: 4370657 (1983-01-01), Kaloi
patent: 4415900 (1983-11-01), Kaloi
patent: 4761654 (1988-08-01), Zaghloul
patent: 4812855 (1989-03-01), Coe et al.
patent: 4847625 (1989-07-01), Dietrich et al.
Patent Abstracts of Japan, vol. 8, No. 99, E243, abstract of JP 59-16402, pub 1984-01-27 Nippon Denshin Denwa Kosha.
Electronics Letters, Jul. 30, 1987, vol. 23, No. 16, pp. 835-837, Lee et al: "Radiation Characteristics of Microstrip Arrays With Parasitic Elements".
Electronics Letters, Oct. 25, 1984, vol. 20, No. 22, pp. 931-933, Entschladen et al: "Microstrip Patch Array Antenna".
Lee et al: "Microstrip Antenna Array Wit Parasitic Elements," pp. 795-797.

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