Microstrip antenna and antenna array

Details Microstrip antenna and antenna array Microstrip antenna and antenna array

1983-12-06

1986-11-18

Lieberman, Eli

Communications: radio wave antennas

Antennas

Microstrip

343829, H01Q 138

Patent

active

046238930

ABSTRACT:
A microstrip antenna comprises a first dielectric layer having a permittivity of 2.5-12.5 carrying the ground plane on one face and a feeder-resonator on the opposite face; a second dielectric layer thereover having a permittivity of 2.2-2.5 and carrying on its outer face a radiator electromagnetically coupled to the feeder-resonator; and spacing means spacing the second dielectric layer from the first a distance of up to seven times the thickness of the first, and providing a permittivity between the two dielectric layers which is approximately that of air. Matching of the antenna is obtained by varying the spacing between the two dielectric layers. The gain of the radiating element is better than 7.5 dbi for bandwidth of 15%. Sidelobe level is less than 15 dB in azimuth and elevation plan. The radiation pattern of the antenna is symmetric in both azimuth and elevation plan.

REFERENCES:
patent: 4477813 (1984-10-01), Weiss
Carver et al, IEEE Trans. on Antennas and Propagation, vol. AP-29, No. 1, Jan. 1981, "Microstrip Antenna Technology", pp. 2-24.
Johnson et al., "Antenna Engineering Handbook", 2nd edition, 1984, ch. 7, pp. 7-7 to 7-9.

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