Broadband circularly polarized stacked patch antenna for universal UHF RFID applications

Chen, Bo-Shau; Sim, Chow‐Yen‐Desmond

doi:10.1109/isanp.2014.7026549

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…Circular polarization and wide bandwidth are realized using an inverted Z-shaped coupling feedline. The proposed antenna has smaller size, lower axial ratio (AR), and wider bandwidth compared with other microstrip structures with air gap [20], [21].…”

Section: Circularly Polarized Reader Antennas Are Usually Requiredmentioning

confidence: 99%

Compact Circularly Polarized Microstrip Ring Antenna Using Capacitive Coupling Structure for RFID Readers

Yuan

Chen

et al. 2020

IEEE Access

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This paper presents a compact circularly polarized microstrip antenna for radio frequency identification (RFID) readers. The dimensions of the proposed antenna are reduced by etching a cross slot in the radiation patch and loading four grounded coupling patches on the four corners of the radiation patch. An inverted Z-shaped coupling feedline is used to realize circularly polarized operation. The measured −10 dB |S 11 | bandwidth, 3-dB axial ratio bandwidth and maximum gain are 872−1095 MHz, 888−933 MHz, and 5.52 dBi, respectively, at 922 MHz frequency. The overall dimension of the proposed antenna is 0.36 λ g × 0.36 λ g × 0.05 λ g (λ g is the guide wavelength at the center frequency of 915 MHz). The proposed antenna has small size with good overall performance and is suitable for compact RFID devices. INDEX TERMS Circular polarization (CP), coupling patch, coupling feedline, microstrip antenna, radio frequency identification.

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Section: Circularly Polarized Reader Antennas Are Usually Requiredmentioning

confidence: 99%

Compact Circularly Polarized Microstrip Ring Antenna Using Capacitive Coupling Structure for RFID Readers

Yuan

Chen

et al. 2020

IEEE Access

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High-gain low-profile circularly polarized patch antenna for universal RFID reader application

Zhou

Sun

2021

Journal of Electromagnetic Waves and Applications

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Circularly Polarized Cross-Dipole Antenna for UHF RFID Readers Applicated in the Warehouse Environment

Xue¹,

Zhang

Li³

et al. 2023

IEEE Access

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In this paper, we proposed a broadband circularly polarized antenna with wide beamwidth. The main structure of the proposed antenna is a combined cross-polarized dipole antenna with four metal arms feeding by a single coaxial cable and two 90°phase delay lines. In order to attain a wide beamwidth antenna performance that can be used in a warehouse environment, we innovatively bent the metal arms and added a metal plane at a specific location to gain maximum beamwidth and the highest achievable gain. Especially, the application of folded metal arms not only reduce the space size of antenna, but also possess good axial ratio characteristic. The measurement illustrates that the antenna prototype achieves S 11 < -10 dB impedance bandwidth (IBW) of 40% (820 -1230 MHz), a 3-dB axial ratio bandwidth (ARBW) of 7.3% (895 -970 MHz), and a maximum half-power beamwidth (HPBW) of 104°(@915 MHz). In addition, the good radiation characteristics of a gain of 6.33 dBic and an average radiation efficiency of 76.3% were measured in the operating bandwidth, in which make the antenna a good candidate for the hasty logistics radio frequency identification (RFID) system.INDEX TERMS Wide beamwidth, Circular polarization (CP), single feed, cross-polarized dipole, folded metal arms, RFID

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Broadband circularly polarized stacked patch antenna for universal UHF RFID applications

Cited by 7 publications

References 11 publications

Compact Circularly Polarized Microstrip Ring Antenna Using Capacitive Coupling Structure for RFID Readers

Compact Circularly Polarized Microstrip Ring Antenna Using Capacitive Coupling Structure for RFID Readers

High-gain low-profile circularly polarized patch antenna for universal RFID reader application

Circularly Polarized Cross-Dipole Antenna for UHF RFID Readers Applicated in the Warehouse Environment

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