Abstract
In this paper, a modified design of a planar square-loop antenna is presented for Electronic Article Surveillance (8.2 MHz) Radio Frequency Identification applications. The main purpose of the proposed design is to enhance the transmission efficiency of a loop antenna without disturbing other performance parameters. For that purpose, the spacing between the loop turns is adjusted in such a way that the coupling between similar loop antennas can be enhanced. Therefore, from measured results, it is observed that the proposed antenna provides a transmission efficiency of 63.92% at a center frequency of 8.198 MHz, and it also provides a –10 dB impedance bandwidth of 6 kHz.
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