Title: Rotatable radar antenna feed and receiver horn

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Claims: I claim:

1. A monopulse radar antenna feed comprising:

a radio frequency energy comparator having a first sum port, a difference port, and a second sum output means including a coupling probe, said comparator being supported on the radar antenna by a first sum waveguide and a difference waveguide coupled in alignment with said first sum port and said difference port, respectively;

a cylindrical housing rotatably mounted to said comparator, and

an enlarged susceptor pin and first and second smaller susceptor pins passing through diameters of said cylindrical housing, said susceptor pins being parallel with one another whereby linearly polarized energy radiated from said feed is rotated as said cylindrical housing is rotated.

2. A monopulse radar antenna feed as set forth in claim 1 wherein said enlarged susceptor pin has a susceptance of -4 and said first and second smaller susceptor pins each have a susceptance of -2.
Other info:

Inventors: Brickey, Orville G. (Indianapolis, IN, US)

Application Number: 851158
Filing Date: 1969-08-14
Publication_date: 1976-02-10
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 343/756 333/21A, 333/21R, 333/122, 342/153, 342/188, 343/763, 343/786
Other Classes:
US Patent Ref:

2845622	Jul, 1958	Gamble	343/16.
3215957	Nov, 1965	Dantzig et al.	343/100.
3268894	Aug, 1966	Lewis et al.	343/756.
3287729	Nov, 1966	Mark et al.	343/756.
3453617	Jul, 1969	Begeman et al.	343/16.

Other Refs:
Primary Examiner: Hubler, Malcolm F.
Assistant Examiner:
Attorney: Sciascia; R. S., Collignon; Paul S.