Mode coupler for monopulse applications having H.sub.01 mode ext

Details Mode coupler for monopulse applications having H.sub.01 mode ext Mode coupler for monopulse applications having H.sub.01 mode ext

1989-12-01

1991-11-19

LaRoche, Eugene R.

Communications: radio wave antennas

Antennas

Wave guide type

333137, 333117, 342153, H01P 1161, H01Q 2502

Patent

active

050669591

ABSTRACT:
A mode coupler for monopulse applications in an antenna feed system which is used for obtaining angle deviations in azimuth and elevation, and which has a main wave guide in which a plurality of electromagnetic wave modes can be propagated. The mode coupler also has a plurality of mode-selective in/out coupling ports which are all formed as simple standard wave guides mounted on the main wave guide, and in which only the H.sub.10 mode is propagatable. A separator plate is disposed in the main wave guide to convert the (H.sub.11 +E.sub.11) mode into two phase-opposed wave guide waves and, via a coupling loop, to couple them into a second wave guide mounted laterally on the main wave guide. The front edge of the separator plate forms a reflector for the H.sub.01 mode, and the reflected HO.sub.1 wave is coupled out of the main wave guide by a pair of wave guides mounted symmetrically on the main wave guide and connected via an H-plane junction to a common output wave guide.

REFERENCES:
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patent: 4047128 (1977-09-01), Morz
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patent: 4622524 (1986-11-01), Morz
patent: 4707702 (1987-11-01), Withers
Davis, Daniel, "Corrugations Improve Monopulse Feed Horns", Microwaves, Apr. 1972, pp. 58-60.
Beardow, T., "Waveguide Manufacturing Techniques", British Communication and Electronics, Oct. 1958, pp. 772-778.
Skolnik, "Radar Handbook", 1970, pp. 21-18-21-23.

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