Hits:

Affiliation of Author(s):电子信息工程学院

Title of Paper:A CP antenna of wide half-power beamwidth for UHF RFID near- and far-field applications

Journal:Prog. Electromagn. Res. Lett.

Abstract:A wide half-power beamwidth antenna based on magnetic coupling in near-field (NF) regions and circular polarization (CP) in far-field (FF) is proposed for RFID multiservice applications in UHF band. The prototype consists of a cross-strip and an L-shaped strip on the top layer, fed by an F-shaped network on the bottom layer. CP electromagnetic wave is radiated by the cross-strip, and the antenna also simultaneously brings opposite directed currents (ODC) to generate strong magnetic field in near-field region. Half-power beamwidth is 100° in xoz-plane and 102° in yoz-plane, which can be used to scan for large regions. An 88×88×1.6mm3antenna has been fabricated on an FR-4 substrate to fit RFID applications. Measured tests on read range by observing feedback received signal strength indication (RSSI) values are carried out, exhibiting 100% read rate for near-field tags within 25mm and exciting read distance for far-field tags up to 1m for large reading region of 170 × 170mm2. © 2018, Electromagnetics Academy. All rights reserved.

ISSN No.:1937-6480

Translation or Not:no

Date of Publication:2018-01-01

Co-author:郑景明,Yang Yang

Correspondence Author:hxx