Rungsinee Sukkamat

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This paper proposes a circularly polarized unidirectional antenna using a probe excited circular ring with inserted perpendicular slabs above the square reflector for UHF-RFID system. The measured &#x007C;S<inf>11</inf>&#x007C; &#x2264; &#x2212;10 dB covers 884&#x2013;1000 MHz or 12.31% bandwidth, and 3-dB AR bandwidth of 900&#x2013;1000 MHz or 10.53%(More)
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