Dual-band circularly polarized antenna

Details Dual-band circularly polarized antenna Dual-band circularly polarized antenna

2008-01-01

2008-01-01

Owens, Douglas W. (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S770000, C343S840000, C343S846000, C343S853000, C343S892000, C343S912000

Reexamination Certificate

active

07315283

ABSTRACT:
A dual-band circularly polarized antenna is disclosed, more particularly a dual-band circularly polarized antenna being able to transmit and receive circularly polarized signals at two different frequency bands, simultaneously. The dual-band circularly polarized antenna of the present invention comprises a first polarized radiating element with at least one corner being chamfered, a plurality of second polarized radiating elements with each of the second polarized radiating elements having at least one corner being chamfered, a signal distributor for distributing an electrical signal, a signal coupling unit electrically connecting with the first polarized radiating unit and the signal distributor, and a ground plate. The dual-band circularly polarized antenna of the present invention not only can be manufactured with a low cost, but also has a simpler structure. As a result, the dual-band circularly polarized antenna of the present invention can be easily integrated into the antenna module of an RFID system.

REFERENCES:
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patent: 6084548 (2000-07-01), Hirabe
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patent: P3006867 (1999-11-01), None
patent: P2001-512640 (2001-08-01), None

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