Cavity-Backed Circular-Polarized Compact Slot Antenna for Handheld UHF RFID Reader
Authors:
- 6 March 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Antennas and Wireless Propagation Letters
- Vol. 14 (15361225) , 1439-1442
Abstract
By associating advantages of conventional antennas (such as the microstrip patch, inverted-F antenna, planar inverted-F antenna, and wire loop antennas) with Babinet's principle, a new compact circular-polarized antenna structure is proposed for the handheld RFID reader in Europe UHF band. Consisting of a meandered slot loop structure and an electric conductor as a reflector, the proposed antenna offers a significant gain of 4.5 dBic and a large HPBW of nearly 120 ° while the dimensions are retained only a quarter-wavelength at 868 MHz (86 mm × 86 mm × 12 mm). Furthermore, the circular-polarized (CP) performance of the proposed antenna is remarkable: axial ratio (AR) of 0.4 dB, 3 dB-AR-beamwidth of about 120 ° at the resonant frequency, and stability of CP performance when the antenna is located near a conducting body.Keywords
Funding Information
- University Grenoble Alpes
This publication has 6 references indexed in Scilit:
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