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2010-02-01
Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna
By
Progress In Electromagnetics Research C, Vol. 12, 65-77, 2010
Abstract
In this paper, we propose a circularly polarized (CP) stacked annular-ring microstrip antenna (SARMSA) with an integrated feeding network in the UHF RFID band. A circular parasitic patch is suspended above the annular ring to improve the impedance matching and bandwidth. Through the parametric studies on SARMSA, the CP characters of the entire antenna are well understood,and an optimized CP character is obtained. Prototypes are fabricated to confirm the theoretical results. The experimental results indicate the impedance bandwidth for S11<-10 dB is 870-967 MHz (10.6% at 915 MHz),and the 3 dB AR bandwidth is 893-948 MHz (6%). Meanwhile, the measured CP gain reaches 8.9 dBic at 915 MHz.
Citation
Xi Chen Guang Fu Shu-Xi Gong Ya-Li Yan Jin Chen , "Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna," Progress In Electromagnetics Research C, Vol. 12, 65-77, 2010.
doi:10.2528/PIERC09121505
http://www.jpier.org/PIERC/pier.php?paper=09121505
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