Omnidirectional, circularly polarized, cylindrical microstrip an

Details Omnidirectional, circularly polarized, cylindrical microstrip an Omnidirectional, circularly polarized, cylindrical microstrip an

1983-04-06

1985-07-02

Lieberman, Eli

Communications: radio wave antennas

Antennas

Microstrip

343791, H01Q 138, H01Q 918

Patent

active

045271631

ABSTRACT:
A microstrip cylindrical antenna comprised of two concentric subelements on a ground cylinder, a vertically polarized (E-field parallel to the axis of the antenna cylinder) subelement on the inside and a horizontally polarized (E-field perpendicular to the axis) subelement on the outside. The vertical subelement is a "wraparound" microstrip radiator. A Y-shaped microstrip patch configuration is used for the horizontally polarized radiator that is wrapped 1.5 times to provide radiating edges on opposite sides of the cylindrical antenna for improved azimuthal pattern uniformity. When these subelements are so fed that their far fields are equal in amplitude and phased 90.degree. from each other, a circularly polarized EM wave results. By stacking a plurality of like antenna elements on the ground cylinder, a linear phased array antenna is provided that can be beam steered to the desired elevation angle.

REFERENCES:
patent: Re29296 (1977-07-01), Krutsinger et al.
patent: 4204212 (1980-05-01), Sindoris et al.
patent: 4323900 (1982-04-01), Krall et al.
A. D. Krall, J. M. McCorkle, John E. Scarzello and A. M. Syelles, "The Omni Microstrip Antenna: A New Small Antenna," IEEE Transactions on Antennas and Propagation, vol. AP-27, Nov. 1979, pp. 850-853.
G. H. Brown and O. M. Woodward, Jr., "Circularly-Polarized Omnidirectional Antenna," RCA Review, Jun. 1947, pp. 259-269.
Robert E. Munson, "Conformal Microstrip Antennas and Microstrip Phased Arrays," IEEE Transactions on Antennas and Propagation, vol. AP-22, Jan. 1974, pp. 74-78.
K. R. Carver and J. W. Mink, "Microstrip Antenna Technology," IEEE Transactions on Antennas and Propagation, vol. AP-29, No. 1, Jan. 1981, pp. 13-16.

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