A Small and Lightweight Antenna for Handheld RFID Reader Applications

Bang, Jaehoon; Bat-Ochir, Chinzorig; Koh, Hyung-Suk; Cha, Eun‐Jong; Ahn, Bierng-Chearl

doi:10.1109/lawp.2012.2217311

Cited by 26 publications

(23 citation statements)

References 7 publications

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“…Specifically, the compact circularly polarized antenna for the application of UHF RFID handheld reader has recently been developed quickly [10][11][12][13][14][15][16][17][18][19][20]. Those antennas are realized by using asymmetriccircular shaped slotted microstrip, cross-shaped slotted microstrip [10,11,13], crossed dipoles with different shapes [14][15][16], four meandered monopoles [17], X-shaped slotted square-patch with cross-strip proximity-fed technique [18], and Koch fractal geometry [20].…”

Section: Introductionmentioning

confidence: 99%

“…Those antennas are realized by using asymmetriccircular shaped slotted microstrip, cross-shaped slotted microstrip [10,11,13], crossed dipoles with different shapes [14][15][16], four meandered monopoles [17], X-shaped slotted square-patch with cross-strip proximity-fed technique [18], and Koch fractal geometry [20]. Most of those designs realize circular polarization by integrating a four-way phase shift network.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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“…An external excitation curl antenna achieved impedance and axialratio bandwidth of about 8.6%, but with a height of 0.42 wavelength and tilted radiation pattern [4]. An antenna consisted of four meandered monopole elements, had a 3-dB axial-ratio beamwidth of 146 o , however the bandwidth is less than 2% [5]. Wider bandwidth, pure circular polarization, wider beamwidth and higher gain are very difficultly to be achieved by a single antenna, let alone the antenna should be simple for the design, fabrication and integration.…”

Section: Introductionmentioning

confidence: 99%

Single-layer single-feed bidirectional radiated circularly polarized ‘G’-shaped microstrip-line antenna

Zhang

Liang

Geng

et al. 2015

2015 International Workshop on Antenna Technology (iWAT)

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A single-layer single-feed bidirectional radiated circularly polarized 'G'-shaped microstrip-line antenna is proposed. The 'G'-shaped microstrip-line is composed of multi segments for good matching and pure circular polarization. Moreover, a semi circle arc shaped ground is used to obtain no tilted radiation pattern. Simulations show that the antenna has 10-dB return loss bandwidth of 9%, 3-dB axial-ratio bandwidth of 11% and beamwidth of 60 o , and the gain is larger than 3.6 dBic over the band from 4.4 GHz to 5 GHz.

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“…However, the bulky configurations of these antennas are not desirable for handheld devices because they require a lightweight CP antenna with a low profile and small size. Various types of antennas with a planar structure and CP radiation for UHF RFID handheld and portable readers have been reported, including microstrip antennas , phase‐delay fed antennas , and slot antennas . However, the aforementioned antennas are still heavy (>10 g) owing to the use of a thick high‐density substrate or a multilayer substrate.…”

Section: Introductionmentioning

confidence: 99%

Planar, Lightweight, Circularly Polarized Crossed Dipole Antenna for Handheld UHF RFID Reader

Choo

2013

Micro & Optical Tech Letters

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A planar, lightweight, crossed dipole antenna with circularly polarized (CP) radiation is introduced for application in a radiofrequency identification handheld reader at ultrahigh frequency bands. The dipoles cross through a 90 phase-delay line of a vacant-quarter printed ring that enables broadband characteristic in terms of impedance matching and 3-dB axial ratio (AR) bandwidths. Four printed inductors are symmetrically inserted into the dipole arms whose ends are barbed to achieve a compact size. A sample antenna with a size of 60 3 60 3 0.508 mm and weight of 3.6 g is designed, fabricated, and measured. The proposed antenna yields an impedance bandwidth of 851-941 MHz for |S 11 | < 210 dB and a 3-dB AR bandwidth of 902-921 MHz. At 910 MHz, the antenna radiates bidirectional CP waves with a gain of 1.4 dBic and an AR of 1.1 dB.

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A Small and Lightweight Antenna for Handheld RFID Reader Applications

Cited by 26 publications

References 7 publications

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

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

Single-layer single-feed bidirectional radiated circularly polarized ‘G’-shaped microstrip-line antenna

Planar, Lightweight, Circularly Polarized Crossed Dipole Antenna for Handheld UHF RFID Reader

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