Communications: radio wave antennas – Antennas – Microstrip
Patent
1977-10-06
1978-11-14
Smith, Alfred E.
Communications: radio wave antennas
Antennas
Microstrip
343830, 343846, H01Q 138, H01Q 938, H01Q 148
Patent
active
041258398
ABSTRACT:
Circularly polarized microstrip antennas consisting of thin electrically ducting, square-shaped radiating elements formed on one surface of a dielectric substrate and having a ground plane on the opposite surface of the substrate. Two feed points are used to provide a circular polarized radiation pattern. The feed points are located along the centerlines of the antenna length and width or along the diagonal lines of the element and the input impedances can be varied by moving the feed points along both centerlines or both diagonal lines from the centerpoint of the element. The antennas can be notched in from the edges of the radiating element along the centerlines of the element width and length, or along opposite diagonal lines of the element, to the optimum input impedance match feed point.
REFERENCES:
patent: 3803623 (1974-04-01), Charlot, Jr.
patent: 3921177 (1975-11-01), Munson
patent: 3972049 (1976-07-01), Kaloi
patent: 3984834 (1976-10-01), Kaloi
patent: 4012741 (1977-03-01), Johnson
Barlow Harry E.
Sciascia Richard S.
Smith Alfred E.
St.Amand Joseph M.
The United States of America as represented by the Secretary of
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