Gamma feed microstrip antenna

Details Gamma feed microstrip antenna Gamma feed microstrip antenna

H - Electricity

01

Q

351/58, 343/67

H01Q 21/06 (2006.01) G01S 13/60 (2006.01) H01Q 1/28 (2006.01) H01Q 25/00 (2006.01)

Patent

CA 1193715

GAMMA FEED MICROSTRIP ANTENNA ABSTRACT OF THE DISCLOSURE A gamma feed microstrip antenna for a Doppler naviga- tion system includes a forward firing feed parallel spaced to a backward firing feed. A plurality of parallel spaced radiating arrays are transversely connected between the feeds. Each array includes radiating elements of preselected sizes having radiating coefficients and coupling coefficients to the feeds whereby an amplitude function of the antenna along the axis of travel is a truncation of a long slanted array amplitude function. Sequential excitation of four input ports at the ends of the feeds causes sequential generation of four beams. Return signals to the antenna, at the four input ports, may be sampled and held for averaging. This results in frequency, temperature and over-water corrections.

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