Communications: radio wave antennas – Antennas – Microstrip
Patent
1984-02-28
1986-01-14
Lieberman, Eli
Communications: radio wave antennas
Antennas
Microstrip
H01Q 138
Patent
active
045648425
ABSTRACT:
A singly fed circularly polarized microstrip antenna has a dielectric substrate having a ground layer coated on one side thereof and a metallic patch radiator coated on the other side thereof. The radiator takes any arbitrary configuration and excites circularly polarized waves at two frequencies. The feed point is located on the loci, determined by the exciting frequency and the circularly polarized wave rotation direction.
REFERENCES:
patent: 3984834 (1976-05-01), Kaloi
patent: 4012741 (1977-03-01), Johnson
Haneishi et al., "A Design Method of Circularly Polarized Rectangular Microstrip Antenna by One-Point Feed," Electronics & Communications in Japan, vol. 64-B (1981) Apr., No. 4, pp. 46-54.
Richards et al., "An Improved Theory for Microstrip Antennas and Applications," IEEE Trans., vol. AP-29, Jan. 1981, pp. 38-46.
Kerr, "Microstrip Polarization Techniques", 1978 Symposium on Antenna Applications, University of Illinois, 20-22 Sep., pp. 1-17.
Long et al, "An Experimental Study of the Circular-Polarized Elliptical Printed Circuit Art.", IEEE Trans., vol. AP-29, No. 1, Jan. 1981, pp. 95-98.
Lieberman Eli
Tokyo Shibaura Denki Kabushiki Kaisha
Wimer Michael C.
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