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Progress In Electromagnetics Research
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CIRCULAR MICROSTRIP SLOT ANTENNA FOR DUAL-FREQUENCY RFID APPLICATION

By J.-J. Tiang, M. T. Islam, N. Misran, and M. Singh

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Abstract:
A compact wideband dual-frequency microstrip antenna is proposed in this paper. By employing an offset microstrip-fed line and a strip close to the radiating edges in the circular slot patch, an antenna operating at dual frequency with the impedance bandwidth of 26.2% and 22.2% respectively is presented. By attaching a strip to the radiating edges opposite to the microstrip-fed line, this alters the current distribution and radiation on the antenna at the second resonant frequency. The second frequency is also tunable by varying the lengths of the microstrip-fed line. It is demonstrated that the proposed antenna covers the widebands of UHF and microwave for RFID application. A good agreement is obtained between the simulated and experimental results.

Citation:
J.-J. Tiang, M. T. Islam, N. Misran, and M. Singh, "Circular Microstrip Slot Antenna for Dual-Frequency RFID Application," Progress In Electromagnetics Research, Vol. 120, 499-512, 2011.
doi:10.2528/PIER11090202
http://www.jpier.org/PIER/pier.php?paper=11090202

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