Design and Implementation of a Novel Directional Coupler for UHF RFID Reader
Journal Title: Elektronika - Year 2016, Vol 20, Issue 1
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.
Authors and Affiliations
Jianxiong Li, Shanlin Song, Xiaoyu Chen, Hua Nian, Weiguang Shi
Keywords
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- EP ID EP362513
- DOI 10.7251/ELS1620022L
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