Broadband quasi-microstrip antenna

Details Broadband quasi-microstrip antenna Broadband quasi-microstrip antenna

1993-07-16

1995-05-16

Hajec, Donald

Communications: radio wave antennas

Antennas

Microstrip

343795, H01Q 138

Patent

active

054164907

ABSTRACT:
Described is a generally planar antenna having a tapered array of radiating/receiving elements that are transversely mounted in capacitive coupling to an elongated transmission line that underlies the array. The shorter dipole elements resonate at high frequencies, the longer dipole elements resonate at lower frequencies, and the intermediate length dipole elements resonate at intermediate frequencies. The dipole elements are mounted on one surface of a planar dielectric substrate to form a planar, generally triangular shaped pattern having relatively narrow spacing between individual dipole elements (for example, one-twentieth of the wavelength of the intermediate frequencies), and having a relatively large spacing to width ratio. Coupling between the dipole elements causes then to operate as if they were a single broadband dipole element.

REFERENCES:
patent: 4054874 (1977-10-01), Oltman, Jr.
patent: 4800392 (1989-01-01), Garay et al.
patent: 5075691 (1991-12-01), Garay et al.
patent: 5270671 (1993-12-01), Waterman
"Design of a Log Periodic Strip Grating Microstrip Antenna" By R. R. DeLyser et al, International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering, vol. 3, No. 2, (1993) pp. 143-150.
"Multifrequency Operation of Microstrip Antennas Using Aperture Coupled Parallel Resonators" By Croq et al, IEEE Transactions on Antennas and Propagation, vol. 40, No. 11, Nov. 1992, pp. 1367-1374.

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