Patent ID: 7315283

Claim:
A dual-band circularly polarized antenna comprising: a first polarized radiating element having at least one chamfered corner; a plurality of second polarized radiating elements, each of the second polarized radiating elements having at least one chamfered corner; a signal distributor for distributing an electrical signal; a signal coupling unit being electrically connected with the first polarized radiating element and the signal distributor respectively; and a ground plate; wherein, as the dual-band circularly polarized antenna is in a transmitting state, the electrical signal is transmitted to the first polarized radiating element and the second polarized radiating elements by the signal distributor and the signal coupling unit therethrough, the first polarized radiating element and the second polarized radiating elements transform the electrical signal into a first circularly polarized signal and a second circularly polarized signal, respectively; as the dual-band circularly polarized antenna is in a receiving state, the first circularly polarized signal and the second circularly polarized signal are received by the first polarized radiating element and the second polarized radiating elements, and the first circularly polarized signal and the second circularly polarized signal are transformed into the electrical signal, the electrical signal is then transmitted through the signal coupling unit to the signal distributor.