Communications: radio wave antennas – Antennas – Microstrip
Patent
1977-11-18
1979-02-13
Lieberman, Eli
Communications: radio wave antennas
Antennas
Microstrip
343854, H01Q 138, H01Q 326
Patent
active
RE0299111
ABSTRACT:
A microstrip antenna structure formed from a unitary conducting surface separated from a ground plane by a dielectric film where the r.f. radiator and feedlines form a generally planar arrangement of unitary integrally formed electrical conductors. The r.f. radiators are fed from an outside edge to selectively produce linearly and/or circularly polarized radiation at a selected resonant frequency(s). Necessary fixed phase shifting circuits are integrally formed by printed circuit techniques in the generally planar arrangement of electrical conductors for the circularly polarized radiators. A plurality of such antenna elements are also formed into a phased antenna array to achieve substantially ideal array gain thus producing an extremely high gain antenna with inexpensive printed circuit board construction techniques. Furthermore, appropriately controlled phase shifting networks may be integrally formed within the generally planar array of electrical conductors in combination with switchable diode elements to achieve any desired relative phase shifts between the array elements and thus to steer the array beam in a desired direction.
REFERENCES:
patent: RE29296 (1977-07-01), Krutsinger et al.
patent: 2874276 (1959-02-01), Dukes et al.
patent: 3400405 (1968-09-01), Patterson
patent: 3478362 (1969-11-01), Ricardi et al.
patent: 3665480 (1972-05-01), Fassett
patent: 3680136 (1972-07-01), Collings
patent: 3753162 (1973-08-01), Charlton et al.
patent: 3778717 (1973-12-01), Okoshi et al.
patent: 3803623 (1974-04-01), Charlot
Ball Corporation
Haynes J. David
Lieberman Eli
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