Design and Implementation of a Novel Directional Coupler for UHF RFID Reader

Authors

  • Jianxiong Li
  • Shanlin Song
  • Xiaoyu Chen
  • Hua Nian
  • Weiguang Shi

DOI:

https://doi.org/10.7251/ELS1620022L

Abstract

The directional coupler is applied to isolating RX from TX because of low cost and simplicity compared to the circulator in the radio-frequency identification (RFID) reader. Because of unequal phase velocity between odd and even mode, the drawback of the traditional microstrip directional coupler is poor isolation. In this paper, to obtain a good isolation between RX and TX, a novel directional coupler is proposed to be applied to the UHF RFID system with a single antenna. Measurement result shows that the proposed directional coupler possesses a good isolation of -35dB in operating frequency band.

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Published

2016-07-15

Issue

Vol. 20 No. 1 (2016): Electronics, Volume 20, Number 1

Section

Чланци

License

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