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2013-08-20
A Novel Technique for Broadband Circular Polarized PIFA and Diversity PIFA Systems
By
Progress In Electromagnetics Research, Vol. 142, 41-55, 2013
Abstract
In this paper, a novel technique for planar inverted-F antenna (PIFA) with broadband circular polarization and pattern diversity is proposed. A defeated ground structure (DGS) has achieved broadband circular polarized (CP) PIFA by using a square branch at the ground corner with arrow-shaped slot. The pattern diversity PIFA system consists of two CP PIFAs placed symmetrically on the diagonal of DGS. Furthermore, the DGS improves port-to-port isolation by using another smaller square branch at the opposite ground corner. Finally, a prototype is fabricated and measured. The measured results agree well with simulation, and show 10-dB matching bandwidth of 16.3% (825-986 MHz), 3-dB axial ratio (AR) bandwidth of 15.5% (830-982 MHz), and 25-dB isolation bandwidth of 12.4% (848-968 MHz), which shows suitability for radio-frequency-identification (RFID) application.
Citation
Xiao-Zheng Lai Ze-Ming Xie Xuan-Liang Cen Zhiyong Zheng , "A Novel Technique for Broadband Circular Polarized PIFA and Diversity PIFA Systems," Progress In Electromagnetics Research, Vol. 142, 41-55, 2013.
doi:10.2528/PIER13070405
http://www.jpier.org/PIER/pier.php?paper=13070405
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