Circularly Polarized Stacked Annular-Ring Microstrip Antenna With Integrated Feeding Network for UHF RFID Readers

Chen, Xi; Fu, Guang; Gong, Shuxi; Yan, Yi; Zhao, Wei‐Jiang

doi:10.1109/lawp.2010.2051791

Cited by 108 publications

(89 citation statements)

References 11 publications

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“…In addition to this, some other antenna designs that exhibit good wideband behavior, are still not able to meet the entire UHF RFID band either as AR bandwidth, or impedance matching bandwidth [10], or both [11] while maintaining a similar or even twice the volume occupied than the proposed antenna in this paper. Table 1 ([ 10,11] and [12][13][14][15][16]) compares recent broadband RFID reader antennas for the use in the UHF band. It specifies the antenna performance in terms of impedance matching, axial ratio (AR), CP gain, and 3-dB AR beamwidth as discussed in the literature.…”

Section: Introductionmentioning

confidence: 94%

A Novel Wideband Circularly Polarized Antenna for Worldwide Uhf Band Rfid Reader Applications

Mireles¹,

Sharma²

2012

PIER B

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Abstract-This paper presents the novel design of a wideband circularly polarized (CP) Radio Frequency Identification (RFID) reader microstrip patch antenna for worldwide Ultra High Frequency (UHF) band which covers 840-960 MHz. The proposed antenna, which consists of a microstrip patch with truncated corners and a cross slot, is placed on a foam substrate (ε r = 1.06) above a ground plane and is fed through vias through ground plane holes that extend from the quadrature 3 dB branch line hybrid coupler placed below the ground plane. This helps to separate feed network radiation, from the patch antenna and keeping the CP purity. The prototype antenna was fabricated with a total size of 225 × 250 × 12.8 mm 3 which shows a measured impedance matching band of 840-1150 MHz (31.2%) as well as measured rotating linear based circularly polarized radiation patterns. The simulated and measured 3 dB Axial Ratio (AR) bandwidth is better than 23% from 840-1050 MHz meeting and exceeding the target worldwide RFID UHF band.

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Section: Introductionmentioning

confidence: 94%

A Novel Wideband Circularly Polarized Antenna for Worldwide Uhf Band Rfid Reader Applications

Mireles¹,

Sharma²

2012

PIER B

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“…Reader antenna, as a key component of RFID system, will directly affect the performance of the whole RFID system. Reader antenna is usually required to be circularly polarized [3]. According to some applications, reader antenna is also required to have wide band, be miniaturized, and in low cost [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Compact Uhf Rfid Handheld Reader Antenna and Array Based on Resonant Quadrifilar Spiral Structure

Zhao¹,

Huang²,

Li³

et al. 2016

PIER C

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Abstract-In this paper, a compact circularly polarized antenna based on a resonant quadrifilar spiral structure for the application of UHF RFID handheld reader is proposed and demonstrated experimentally. To reduce antenna size and improve impedance matching, the original resonant arms are revised by bending inverted-F structures and printing them on dielectric substrates, and the four arms are fed by a four-way phase shift network. Such an antenna indicates stable circular polarization performance and wide beamwidth. The gain bandwidth (> 2 dBic) can cover the frequency band from 902 MHz to 928 MHz, which is suitable for most of the popular UHF RFID systems in the world. Moreover, the 1×4 array and 2×2 array based on previously demonstrated antenna unit are numerically investigated. The array performances, including the gain, beam scanning and low side-lobe are discussed.

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“…Thus, a number of broadband CP antennas with top loading design (stacked patch) for UHF RFID applications have been investigated [3]- [10]. To excite broad CP bandwidth for UHF RFID readers, the technique of applying a stacked annular-ring microstrip antenna with integrated feeding network has been reported [3].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…To excite broad CP bandwidth for UHF RFID readers, the technique of applying a stacked annular-ring microstrip antenna with integrated feeding network has been reported [3]. Although this double-stacked design has demonstrated a low profile characteristic (220 × 220 × 11 mm 3 ) and a high gain of 8.9 dBic, the measured CP bandwidth was only 6% (893-948 MHz). Thus, a low profile double-stacked antenna with compact planar size (220 × 220 × 11 mm 3 ) was studied [4], in which a wide CP bandwidth of 11.6% can be achieved by double shorting four sequential rotating stacked patches.…”

Section: Introductionmentioning

confidence: 99%

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Broadband Circularly Polarized Stacked Patch Antenna for Universal UHF RFID Applications

Chen

Sim

2016

IEICE Trans. Commun.

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SUMMARY A double layer stacked patch antenna with a size of 200 × 200×48 mm 3 is proposed in this investigation. To achieve a broad CP bandwidth that can cover universal UHF RFID applications (840-960 MHz), a slot loaded circular patch antenna fed by an L-shaped probe is designed as the lower layer (main patch), while the top layer (parasitic patch) is a simple circular patch loaded with a cross-slot of dissimilar arm lengths. Besides demonstrating a broad 10-dB return loss bandwidth of 16% (823-966 MHz) and a CP bandwidth (3-dB axial ratio) of 14.0% (837-963 MHz), the proposed antenna also yields maximum gain and minimum radiation efficiency of 8.8 dBic and 85%, respectively, across the universal UHF RFID bands.

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Circularly Polarized Stacked Annular-Ring Microstrip Antenna With Integrated Feeding Network for UHF RFID Readers

Cited by 108 publications

References 11 publications

A Novel Wideband Circularly Polarized Antenna for Worldwide Uhf Band Rfid Reader Applications

A Novel Wideband Circularly Polarized Antenna for Worldwide Uhf Band Rfid Reader Applications

Compact Uhf Rfid Handheld Reader Antenna and Array Based on Resonant Quadrifilar Spiral Structure

Broadband Circularly Polarized Stacked Patch Antenna for Universal UHF RFID Applications

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