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Title:
BROADBAND DUAL CIRCULARLY POLARIZED RFID ANTENNA
Document Type and Number:
WIPO Patent Application WO/2017/032107
Kind Code:
A1
Abstract:
A broadband dual circularly polarized radio frequency identification (RFID) antenna. The antenna comprises: a first medium layer and a second medium layer. A floor copper cladding layer is disposed between the first medium layer and the second medium layer; a plurality of coupling slots are disposed on the floor copper cladding layer, and the coupling slots comprise a first coupling edge strip and a second coupling edge strip, wherein the tail end of the first coupling edge strip is connected to the tail end of the second coupling edge strip, and the first coupling edge strip is perpendicular to the second coupling edge strip; and a Wilkinson power divider is disposed at another side of the second medium layer to feed the copper cladding layer. In this way, a combination of circular polarization and a broad frequency band can be realized, and the axial ratio control can also be realized.

Inventors:
LI, Biao (Keji Road South Hi-Tech Industrial Park Nansha, Shenzhen Guangdong 7, 518057, CN)
CAI, Lingyun (Keji Road South Hi-Tech Industrial Park Nansha, Shenzhen Guangdong 7, 518057, CN)
Application Number:
CN2016/083344
Publication Date:
March 02, 2017
Filing Date:
May 25, 2016
Export Citation:
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Assignee:
ZTE CORPORATION (ZTE Plaza, Keji Road South Hi-Tech Industrial Park Nansha, Shenzhen Guangdong 7, 518057, CN)
International Classes:
G06K19/077; H01Q13/08; H01Q13/10
Foreign References:
CN205029009U2016-02-10
CN204029985U2014-12-17
US20040012527A12004-01-22
Other References:
ZHANG, HUI ET AL.: "Broadband Circularly Polarized H-Shaped Aperture-Coupled Microstrip Patch Antenna", JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, vol. 29, no. 4, 30 April 2007 (2007-04-30), pages 991 and 992, ISSN: 1009-5896
QIAN, ZUPING ET AL.: "Design of Wide-Band Aperture-Coupled Circularly Polarized Microstrip Antenna", CHINESE JOURNAL OF RADIO SCIENCE, vol. 25, no. 4, 31 August 2010 (2010-08-31), pages 739 and 740, ISSN: 1005-0388
BO, XU ET AL.: "Broadband Circularly Polarized Loop Antenna Based on High-pass and Low-pass Filters for Handheld RFID Reader Applications", PIERS PROCEEDINGS, 28 August 2014 (2014-08-28), Guangzhou, China, pages 500 - 502
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (Suite B 1601 A, 8 Xue Qing Rd. Haidian, Beijing 2, 100192, CN)
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