Horn antenna with a choke surface-wave structure on the outer su

Details Horn antenna with a choke surface-wave structure on the outer su Horn antenna with a choke surface-wave structure on the outer su

1986-12-24

1990-01-30

Carroll, J.

Communications: radio wave antennas

Antennas

Wave guide type

H01Q 1302

Patent

active

048976636

ABSTRACT:
A horn antenna for radiating or receiving a microwave is provided with a plurality of axially spaced radial fins fixedly mounted on the outer surface of the horn, which fins form a plurality of radial grooves and a front axial groove each having a depth of approximately equal to a quarter of a wavelength of the microwave. Those fins and grooves form a choke surface-wave structure which improves the radiation pattern and reduces undesired radiation and side lobe. A multimode horn arrangement for a higher frequency wave is employed for the horn so that two different frequency waves are efficiently radiated or received at a single horn antenna with a reduced side lobe and an excellent cross polarization characteristic.

REFERENCES:
patent: 3413642 (1968-11-01), Cook
patent: 3611396 (1971-10-01), Jones, Jr.
patent: 4414516 (1983-11-01), Howard
patent: 4442437 (1984-04-01), Chu et al.
patent: 4447811 (1984-05-01), Hamid
patent: 4604627 (1986-08-01), Saad et al.
patent: 4626863 (1986-12-01), Knop et al.

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