Communications: radio wave antennas – Antennas – Wave guide type
Patent
1998-07-20
2000-11-21
Le, Hoanganh
Communications: radio wave antennas
Antennas
Wave guide type
343779, 343840, H01Q 128
Patent
active
061509906
ABSTRACT:
A unique feed structure for improving the cross-polarization performance of a reflector antenna system is disclosed. According to the present invention, the feed structure is an array including a number of feeds, which are rotated in a predetermined fashion to yield superior cross polarization performance of the antenna system. The array feed in the center of the feed structure is positioned approximately in the focus of the antenna reflector. The array feeds located on the y-axis are slightly rotated in either a clockwise or a counter-clockwise manner. The magnitude of the rotation is proportional to the distance of the feeds from the x-axis along the y-axis. The rotation of the feeds yields significant performance in cross polarization performance, while having little or no co-polarization effect.
REFERENCES:
patent: 3394378 (1968-07-01), Williams et al.
patent: 3710341 (1973-01-01), Sciambi, Jr.
patent: 4236161 (1980-11-01), Ohm
patent: 4855751 (1989-08-01), Ingerson
patent: 5576721 (1996-11-01), Hwang et al.
Fermelia Louis R.
Law Philip H.
Ramanujam Parthasarathy
Chen Shih-Chao
Gudmestad Terje
Hughes Electronics Corporation
Le Hoang-anh
Sales M. W.
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