Patent ID: 7362272
Filing Date: 2008-04-22
Classification: H01Q

Abstract:
1. A circularly polarized antenna; comprising: a plurality of polarized antenna elements for transmitting and receiving a circularly polarized signal; a signal distributor for distributing an electrical signal; and a signal coupling element electrically coupled to the polarized antenna elements and electrically connected to the signal distributor; wherein, the signal coupling element is a coupling-ring and when the circularly polarized antenna is in a transmitting state, the signal coupling element sends the electrical signal from the signal distributor to the polarized antenna elements, and the polarized antenna elements transform the electrical signal into the circularly polarized signal and transmit the circularly polarized signal thereafter; when the circularly polarized antenna is in a receiving state, the polarized antenna elements receive the circularly polarized signal and transform the circularly polarized signal into the electrical signal, and the signal coupling element sends the electrical signal from the polarized antenna elements to the signal distributor; wherein the plurality of polarized antenna elements is four square-shaped polarized antenna elements.