Metamaterial Isolator For Rfid Based Biomedical Repeater System
2017 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING（2017）
Abstract
This paper presents the design of a subwavelength electromagnetic band gap (EBG) isolator for a biomedical repeater device. The repeater device is meant to amplify the attenuated RF signal sent from reader antenna and retransmits it to a miniature implant sensor. The EBG isolator working at UHF RFID frequency of 900 MHz occupies an area of 3.1 cm x 2 cm. It increases isolation between orthogonal loops of the repeater device to more than 25 dB allowing for more than 20 dB gain for the amplifier.
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Key words
EBG isolator, metamaterial isolator, repeater device, orthogonal loops
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