Patent ID: 6774861
Filing Date: 2004-08-10
Classification: H01Q

Abstract:
An antenna system comprising:a low frequency antenna including a paraboloidal main offset reflector for reflecting a low frequency signal; 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, wherein the hyperboloidal subreflector includes a frequency selective surface for passing the low frequency signal reflected by the paraboloidal main offset reflector, and the paraboloidal main offset reflector is for outwardly reflecting the low frequency signal and for inwardly reflecting the high frequency signal, and the hyperboloidal subreflector is further for passing the low frequency signal to the paraboloidal main offset reflector, and for inwardly reflecting the high frequency signal from the paraboloidal main offset reflector.