Planar Endfire Circularly Polarized Antenna for Low Profile Handheld RFID Reader

Zhang, Wenhai; Cheong, Pedro; Lu, Wen‐Jun; Tam, Kam‐Weng

doi:10.1109/jrfid.2018.2817570

Cited by 25 publications

(8 citation statements)

References 35 publications

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“…[] can be employed to serve as diversity antennas for wireless routers with enhanced coverage performance, as shown in Figure . Due to its low‐profile, wideband characteristic, it can be potentially used as a hand‐held radio‐frequency identification (RFID) reader antenna or wearable diversity antenna in body‐area communication systems . In fact, a circular sector magnetic dipole has been widely employed in PECPA designs, where a multi‐resonant circular sector magnetic dipole can be alternatively utilized to enhance the available impedance and AR bandwidth.…”

Section: Applications and Discussionmentioning

confidence: 99%

“…Due to its low‐profile, wideband characteristic, it can be potentially used as a hand‐held radio‐frequency identification (RFID) reader antenna or wearable diversity antenna in body‐area communication systems . In fact, a circular sector magnetic dipole has been widely employed in PECPA designs, where a multi‐resonant circular sector magnetic dipole can be alternatively utilized to enhance the available impedance and AR bandwidth. The multi‐resonant, wideband design technique can be further incorporated with widened AR beamwidth technique to improve the CP purity and available bandwidth.…”

Section: Applications and Discussionmentioning

confidence: 99%

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On the multi‐resonant antennas: Theory, history, and new development

2019

Int J RF Microw Comput Aided Eng

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A survey of multi‐resonant antennas is comprehensively presented, with emphasis on theoretical framework, design approaches, and practical examples. This article begins with a brief history of the multi‐resonant dipole theory, and then concentrates on the design approaches that have been developed to typical, basic antenna elements, for example, electric dipole antenna, slotline antenna, loop antenna, complementary dipole antenna, and microstrip patch antenna. Design examples for different practical applications are then raised. In final, the multi‐resonant antenna design approach is summarized and compared to some relevant antenna design techniques.

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Section: Applications and Discussionmentioning

confidence: 99%

Section: Applications and Discussionmentioning

confidence: 99%

On the multi‐resonant antennas: Theory, history, and new development

2019

Int J RF Microw Comput Aided Eng

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“…At present, the design ways of broadening the bandwidth of CP monopole antenna mainly adopt one or a combination of several methods, such as improving the floor shape, change feed position, adding parasitic structure, and so on. [4][5][6][7][8][9][10][11][12] The square slot was cut off from the floor of a monopole antenna, and then a branch was added to obtain 90.2% impedance bandwidth and 40% 3-dB axial ratio bandwidth (ARBW) in Reference 4. Another antenna used coplanar waveguide (CPW) feed and then slotting on the floor to realize 44.9% and 33% ARBW separately in References 5,6.…”

Section: Introductionmentioning

confidence: 99%

A wideband circularly polarized monopole antenna with elliptic ring slot patch using characteristic mode analysis

Tao

Ding

et al. 2022

Int J RF Mic Comp-Aid Eng

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This article presented a wideband circularly polarization (CP) monopole antenna with elliptic ring slot patch using characteristic mode analysis (CMA). By analyzing the characteristic modes of elliptical patch and elliptical ring patch in turn, it is found that the elliptical ring slot patch can meet the phase requirement of CP. Then, the parasitic elliptical ring slot patch is used to broaden the impedance bandwidth and polarization bandwidth of the antenna.The broadband is obtained by the modal significance (MS) analysis, and the CP is realized by analyzing the characteristic current of two modes are orthogonal and the characteristic angle (CA) close to 90 . The proposed antenna was fabricated and measured with the size of 0.59λ 0 Â 0.59λ 0 Â 0.02λ 0 . The measured 3-dB axial ratio (AR) band is from 5.3 to 9.4 GHz (55.8%), and the À10 dB impedance band is from 4.5 to 9.7 GHz (73.2%).

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“…The CP antenna has excellent demand due to its properties such as orientation insensitive, better weather penetration, and interference reduction in the multipath environment. 1,2 Amid the many different types of CP antenna designs, the endfire CP antennas have been applied in many applications such as radiofrequency identification (RFID), 3 fifth-generation mobile communication, 4 and wireless local area network (WLAN) applications. 5 The magneto-electric dipole [4][5][6][7][8][9][10][11][12][13][14][15] can be used to design a planar endfire CP antenna by the parallel combination of an electric dipole and magnetic dipole.…”

Section: Introductionmentioning

confidence: 99%

Wideband low‐profile endfire circularly polarized antenna using mode superposition technique

Jaiswal

Ojha

Kumari

et al. 2022

Int J RF Mic Comp-Aid Eng

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In this article, a wideband low-profile endfire circularly polarized (CP) antenna using magnetoelectric dipole is proposed. Designing a wideband electric dipole element is easy and well-studied in the literature. However, designing a compact wideband magnetic dipole element is still a challenge. In this paper, the impedance bandwidth (IBW) of the magnetic dipole is enhanced by reducing the resonance frequency of higher-order mode half-TE 310 with the help of rectangular slots placed at the null of mode half-TE 310 . By combining the resonance frequency of mode half-TE 110 and mode half-TE 310 , the magnetic dipole can yield a larger IBW (6.86-7.67 GHz, 11.14%) with smaller planar dimensions of 1.259λ 0 Â 0.363λ 0 Â 0.038λ 0 (λ 0 is the free space wavelength at the centre frequency). To generate a wideband endfire CP wave, a horizontally polarized electric dipole with a feed line is combined with the vertically polarized magnetic dipole. The measured IBW and axial ratio bandwidth (ARBW) are 11.65% and 12.02%, respectively, with a measured peak endfire gain of 5 dBic. The overall dimension of the proposed wideband lowprofile endfire CP antenna is 1.11λ 0 Â 0.66λ 0 Â 0.033λ 0 .

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Planar Endfire Circularly Polarized Antenna for Low Profile Handheld RFID Reader

Cited by 25 publications

References 35 publications

On the multi‐resonant antennas: Theory, history, and new development

On the multi‐resonant antennas: Theory, history, and new development

A wideband circularly polarized monopole antenna with elliptic ring slot patch using characteristic mode analysis

Wideband low‐profile endfire circularly polarized antenna using mode superposition technique

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