Single-Fed Broadband Circularly Polarized Stacked Patch Antenna With Horizontally Meandered Strip for Universal UHF RFID Applications

Wang, Zhongbao; Fang, Shaojun; Fu, Shiqiang; Jia, Shouli

doi:10.1109/tmtt.2011.2114010

Cited by 167 publications

(109 citation statements)

References 27 publications

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“…One approach to enhance both types of bandwidth is through use of thick substrates [10], which tend to support strong surface waves, and consequently, diffraction by the edges of the ground plane resulting in strong back radiation. Other approaches include use of shorting pins or alternative feeding mechanisms [4,11,12], parasitic elements [13][14][15], or even metasurfaces [16].…”

Section: Introductionmentioning

confidence: 99%

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Nestoros¹,

Christou²,

Polycarpou³

2017

PIER C

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Abstract-The primary objective of this paper is to design a high-gain, circularly polarized patch antenna suitable for Radio Frequency Identification (RFID) readers that operate in the FCC and ETSI bands . These designs will be used in a healthcare application to provide tag identification for thousands of medicines stored on shelves inside a pharmaceutical warehouse. Consequently, it is important that these antennas provide sufficient electromagnetic coverage and polarization diversity in order to boost tag readability and minimize item identification errors. The proposed RFID reader antenna design begins with a single patch with truncated corners on air substrate in order to help us understand the effect of various geometrical parameters on critical antenna figures of merit. A stub is introduced in order to improve the impedance matching characteristics of the antenna. The wideband characteristic of the design, for both impedance matching and axial ratio, is achieved by a second truncated-corner patch antenna positioned on top of the first one. An optimum design is achieved by changing the heights of the main and parasitic patches, the size of the truncated corners, and the probe position. The final antenna designs are verified by comparing measurement and simulation results.

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Section: Introductionmentioning

confidence: 99%

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Nestoros¹,

Christou²,

Polycarpou³

2017

PIER C

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show abstract

“…In order to broaden the bandwidth, a wide variety of methods have been reported. In [5], the stacked patch antennas with a sequentially suspended microstrip feed is proposed, which can operate at a wide bandwidth, but the cost is high, and the structure is complex. A horizontally meandered strip fed broadband patch antenna is proposed in [6], and it has a high profile.…”

Section: Introductionmentioning

confidence: 99%

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

Wang¹,

Liu²,

Li³

et al. 2017

PIER Letters

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Abstract-A broadband ultra-high-frequency (UHF) Radio Frequency Identification (RFID) antenna using double-tuned impedance matching theory is proposed. This paper presents a proximity coupled vertical meandered strip feed technique based on double-tuned impedance match which results in a wide bandwidth. This antenna mainly consists of a rectangular ground plane, a U-shaped radiation patch, and a suspended vertical meandered strip (VMS) by mesas of rotated Γ-shaped strip. The Ushaped radiation patch is fed by the VMS. The simulated and measured results show that the antenna has a very wide impedance matching bandwidth of 150 MHz (820-970 MHz) or 16.8% with the voltage standing wave ration (VSWR) less than 1.5 and achieves a high gain level about 8.5 dBi. Therefore, the proposed antenna can cover the entire UHF band of 840-960 MHz and is a good candidate for universal UHF RFID applications.

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“…Recently, patch antennas have attracted increasing attention as an approach for realizing the circular polarization [1][2][3][4][5][6][7]. By using four sequential-rotation proximity-coupled L-probes, the antenna in [1] delivers a measured 3-dB axial ratio bandwidth of 82% from 1 to 2.4 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], the circularly polarized antenna has a lower notched circular patch with a capacitive feeding and an upper parasitic notched patch, and its 3-dB axial ratio bandwidth is 10%. By using the horizontally meandered strip (HMS) feed technique, the circular polarization bandwidth can be enhanced to 13.5% [4]. An H-shaped patch antenna is presented in [5].…”

Section: Introductionmentioning

confidence: 99%

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Wideband Single-Feed Circularly Polarized Antenna

Liang¹,

Jiao²,

Zhang³

et al. 2015

PIER Letters

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Abstract-In this paper, a novel wideband single-feed circularly polarized patch antenna is presented. The antenna consists of an L-shaped probe, four parasitic patches perpendicular to the probe, and a planar reflector. By modifying the structure of the patches, two orthogonal radiation modes are created to realize the circular polarization in the broadside direction. This antenna exhibits a wide impedance bandwidth of 82.4% from 2 GHz to 4.8 GHz for the voltage standing wave ratio (VSWR) ≤ 2 and a 3-dB axial ratio (AR) bandwidth of 56.2% from 2.11 GHz to 3.77 GHz, over which the antenna gains vary from 5.7 dBic to 9.7 dBic. The measured results agree well with the simulated ones.

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Single-Fed Broadband Circularly Polarized Stacked Patch Antenna With Horizontally Meandered Strip for Universal UHF RFID Applications

Cited by 167 publications

References 27 publications

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

Wideband Single-Feed Circularly Polarized Antenna

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