Gamma feed microstrip antenna

Details Gamma feed microstrip antenna Gamma feed microstrip antenna

1982-05-17

1988-05-24

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

With plural beams

343700MS, G01S 1360, H01Q 128, H01Q 322

Patent

active

047469234

ABSTRACT:
A gamma feed microstrip antenna for a Doppler navigation 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 antenna structure is adapted for use to as to provide frequency, temperature and over-water corrections.

REFERENCES:
patent: 3135956 (1964-06-01), Dolce
patent: 3423752 (1969-01-01), Schwartz
patent: 4180818 (1979-12-01), Schwartz et al.
patent: 4203116 (1980-05-01), Lewin
patent: 4320402 (1982-03-01), Bowen
patent: 4347516 (1982-08-01), Shrekenhamer
M. I. Skdnik, Radar Handbook, McGraw-Hill Book Co., 1970, pp. 16-33-16-35.

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