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Unidirectional Dual-Band CPW-Fed Antenna Loaded with an AMC Reflector

By Qun Luo, Huiping Tian, Zhitong Huang, Xudong Wang, Zheng Guo and Yuefeng Ji


A unidirectional dual-band coplanar waveguide fed antenna (DB-CPWFA) loaded with a reflector is presented in this paper. The reflector is made of an electric ground plane, a dielectric substrate, and artificial magnetic conductor (AMC) which shows an effective dual operational bandwidth. Then, the closely spaced AMC reflector is employed under the DB-DPWFA for performance improvement including unidirectional radiation, low profile, gain enhancement, and higher front-to-back (F/B) ratio. The final antenna design exhibits an 8% and 13% impedance bandwidths for 2.45 GHz and 5.8 GHz frequency regions, respectively. The overall gain enhancement of about 4 dB is achieved. The F/B ratio is approximate to 20 dB with a 16 dB improvement. The measured results are inconsistent with the numerical values. The presented design is a suitable candidate for radio frequency identification (RFID) reader application

Topics: Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Publisher: Hindawi Publishing Corporation
Year: 2013
DOI identifier: 10.1155/2013
OAI identifier:
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