The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2004
Filed:
Jun. 19, 2002
Youn H. Choung, Rolling Hills Estates, CA (US);
George H. Simkins, Torrance, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A dual band high efficiency hybrid offset reflector antenna system ( ) that includes a low frequency antenna ( ) including a paraboloidal main offset reflector ( ) for reflecting a low frequency signal, as well as a high frequency antenna ( ) including both the main offset reflector ( ) and a hyperboloidal subreflector ( ) for reflecting a high frequency signal discrete from the low frequency signal. The hyperboloidal subreflector ( ) includes a frequency selective surface ( ) that passes the low frequency signal reflected by the paraboloidal main offset reflector ( ) with low subreflector diffraction loss, and that is highly reflective at the high frequency. Offset beam squint pointing error can be eliminated because the high and low frequency bands have separate feed focal locations ( ).