A high isolated coupled-line passive cir
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Wan-Kyu Kim; Won Na; Jong-Won Yu; Moon-Que Lee
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Article
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2008
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John Wiley and Sons
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English
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## Abstract A coupledβline passive circulator is proposed for improving the TX/RX isolation of the UHF radio frequency identification (RFID) reader. The increased isolation is realized by generating and adding the canceling signal to the leakage. The input return loss of the reader antenna, which c