@inproceedings{d5e6614f3db64a44b058521d29cfed0d,
title = "Square annular-ring antenna with circular polarization for UHF RFID reader",
abstract = "A square annular-ring antenna with circular polarization (CP) for ultra-high-frequency (UHF) radio frequency identification (RFID) reader is presented. The proposed annularring antenna is composed of square-shaped annular-ring radiator, which is fed by four equal amplitude signals with 90° phase difference, and reflector suspended below the radiator. The proposed antenna is matched and optimized using the 4-port antenna matching condition. Experimental results show that the proposed antenna of size 200 × 200 × 11 mm 3 has the peak gain of 7.0 dBic at 915 MHz, front-to-back ratio (F/B) of 30.0 dB, axial ratio under 1.5 dB.",
keywords = "RFID reader antennas, Square annular-ring antenna, circular polarization",
author = "Son, {Wang Ik} and Tae, {Hyun Sung} and Min, {Sang Bo} and Lee, {Moon Que} and Yu, {Jong Won}",
year = "2011",
language = "English",
isbn = "9780858259744",
series = "Asia-Pacific Microwave Conference Proceedings, APMC",
pages = "1810--1813",
booktitle = "Asia-Pacific Microwave Conference Proceedings, APMC 2011",
note = "Asia-Pacific Microwave Conference, APMC 2011 ; Conference date: 05-12-2011 Through 08-12-2011",
}