Patent ID: 6130652
Filing Date: 2000-10-10
Classification: H01Q

Abstract:
An antenna system responsive to both RHCP and LHCP signals, said antenna system comprising:a multiple arm spiral antenna, said antenna including a plurality of spiral antenna arms spiraling out from a common central location;a plurality of first antenna feeds, a separate one of the plurality of first antenna feeds being electrically connected to an inner end of each of the antenna arms at the central location;a plurality of second antenna feeds, a separate one of the plurality of second antenna feeds being electrically connected to each of the antenna arms at an outer end of the antenna arms opposite the central location; andat least one modeformer connected to the first and second antenna feeds, said at least one modeformer separating signals from both the first and second antenna feeds and generating multiple modes of separated RHCP and LHCP signals.