Thin broadband microstrip array antenna having active and parasi

Details Thin broadband microstrip array antenna having active and parasi Thin broadband microstrip array antenna having active and parasi

1996-02-05

1996-11-19

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Microstrip

H01Q 138

Patent

active

055767184

ABSTRACT:
An array antenna embodying on a dielectric support, a periodic succession parallel to an alignment direction of rectangular patches having alternating active patches and parasitic patches. The active patches are identical, fed with electromagnetic energy in areas such that their sides parallel to the alignment direction are radiating sides, sized to have the same resonant frequency and disposed so that their phase centers are at a distance apart less than the wavelength in air associated with the resonant frequency. The parasitic patches are separated from the active patches by slots of constant non-null width extending transversely to the alignment direction and sized to have resonant frequencies near the resonant frequency of the active patches.

REFERENCES:
patent: 4118706 (1978-10-01), Kerr
patent: 4180817 (1979-12-01), Sanford
patent: 4370657 (1983-01-01), Kaloi
patent: 4401988 (1983-08-01), Kaloi
patent: 4835538 (1989-05-01), McKenna et al.
patent: 4849765 (1989-07-01), Marko
patent: 5008681 (1991-04-01), Cavallaro et al.
patent: 5220335 (1993-06-01), Huang
Bahl et al, Microstrip Antennas, 1980, pp. 56-61.
M. Haneishi et al, Shaped Beam Planar Antenna Using Microstrip Antenna With Open-Circuited Stub, Mar. 30, 1990, pp. 1-6.

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