scholarly journals A COMPACT BROADBAND CIRCULARLY-POLARIZED PATCH ANTENNA WITH WIDE AXIAL-RATIO BEAMWIDTH FOR UNIVERSAL UHF RFID APPLICATIONS

2021 ◽  
Vol 113 ◽  
pp. 1-11
Author(s):  
Zhongbao Wang ◽  
Ya-Nan Wang ◽  
Xinhong Liu ◽  
Hongmei Liu ◽  
Shao-Jun Fang
Keyword(s):  
Patch Antenna ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Rfid Applications

scholarly journals A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications

2007 ◽  
Vol 2007 ◽  
pp. 1-8 ◽  
Author(s):  
Hang Leong Chung ◽  
Xianming Qing ◽  
Zhi Ning Chen
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Parametric Studies ◽  
Hybrid Coupler ◽  
Rfid Applications ◽  
Uhf Band

A broadband circularly polarized stacked probe-fed antenna suitable for UHF RFID applications is presented and studied. The proposed antenna is fed by two probes which are connected to a hybrid coupler. Two parasitic patches are stacked above a primary probe-fed patch to enhance the bandwidth of the antenna. The optimized antenna prototype achieves gain of more than 6.5 dBic, axial ratio of less than 3.0 dB, and return loss of less than−15 dB over the UHF band of 820–980 MHz (17.7%). Parametric studies are carried out to demonstrate the effects of antenna geometry parameters on the performance. The proposed antenna can be a good candidate for UHF RFID applications.

scholarly journals A Wideband Single-Fed, Circularly-Polarized Patch Antenna With Enhanced Axial Ratio Bandwidth for UHF RFID Reader Applications

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 55883-55892 ◽  
Author(s):  
Junlong Li ◽  
Hui Liu ◽  
Shuai Zhang ◽  
Miaohui Luo ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Rfid Reader

scholarly journals Miniaturization of Circularly Polarized Patch Antenna for RFID Reader Applications

2020 ◽  
Vol 10 (3) ◽  
pp. 5655-5659
Author(s):  
K. Mekki ◽  
O. Necibi ◽  
C. Boussetta ◽  
A. Gharsallah
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Radiation Mode ◽  
Circularly Polarized ◽  
Rfid Systems ◽  
Microstrip Patch ◽  
Low Profile ◽  
Reduced Surface

This paper presents a Circularly Polarized Microstrip Patch Antenna (CPMPA) miniaturization with parasitic elements, suitable for UHF RFID systems. The antenna consists of a half E-shaped patch with cuts. A truncated corner patch can generate an additional Circular Polarization (CP) radiation mode and further enhance the axial ratio. Two symmetric cross shaped slots along the horizontal axis of the CPMPA have been embedded, and its dimension optimization has been based on parametric analysis. Thanks to this slotted structure and reduced surface area, good CP quality has been obtained with a 25% overall size reduction. The proposed antenna is lightweight, low profile, simple, and easily produced. The structure’s simulation is made using CST Studio Suite 2014 to compute return loss (S11), gain, and the axial ratio of the antenna while the overall miniaturized antenna’s volume is 77mm×58mm×1.6mm operating at 915MHz.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

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