A Design of a circularly polarized small UHF RFID antenna

소형 원형편파 UHF RFID 대역 융합형 안테나 설계

  • Chae, Gyoo-Soo (Division of Information & Communication Eng., Baekseok University)
  • Received : 2014.12.04
  • Accepted : 2015.02.20
  • Published : 2015.02.28


A circularly polarized small UHF RFID reader antenna is presented. The antenna is composed of four elements and printed on the plastic substrate(${\varepsilon}_r=2.2$, t=5mm). Each element is fed by a probe which is sequentially connected to the feed line. The feed line is manufactured on the FR-4 substrate(t=1.0mm, ${\varepsilon}_r=4.7$). The simulation results shows that the antenna can be achieved a return loss of 12dB, gain of 3.46dBic over the UHF band of 902-928MHz. According to our simulation results, two prototype antennas are manufactured and measured. The obtained antennas operate in UHF RFID bands and can be adapted for various portable applications. In addition, a parametric study is conducted to facilitate the design and optimization processes.


Supported by : 백석대학교


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