Device for exciting a waveguide with circular polarization from

Details Device for exciting a waveguide with circular polarization from Device for exciting a waveguide with circular polarization from

1988-11-07

1991-04-23

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

343778, 343786, 343789, 333 21A, 333 26, H01Q 138

Patent

active

050103482

ABSTRACT:
A device for exciting a waveguide with circular polarization from a plane antenna, said waveguide (10) being a rectilinear hollow waveguide closed at one of its ends (12), said antenna being excited by at least two coaxial ports (13, 14) fed in phase quadrature by a circuit including a hybrid coupler (15), and being constituted by a radiating plane metal pattern (11) disposed on the surface of an insulating substrate (18) closing the waveguide (10) perpendicularly to its axis of symmetry.

REFERENCES:
patent: 3665480 (1972-05-01), Fassett
patent: 4067016 (1978-01-01), Kaloi
patent: 4743918 (1988-05-01), Rannou et al.
patent: 4761654 (1988-08-01), Zaghloul
Yee et al., "An Extremely Lightweight Fuselage-Integrated Phased Array for Airborne Applications", IEEE Trans. on Antennas and Prop., vol.-29, No. 1, Jan. 1981, pp. 178-182.
Patent Abstract of Japan, vol. 10, No. 248, (E-431) (2304), Aug. 26, 1986 (Sumitomo Electric Ind. Ltd.) 21-04-1986.

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