Compact circularly polarized textile antenna

Ismail, M. F.; Rahim, Mohamad Kamal A.; Saadon, Eddy Irwan Shah; Mohd, M. S.

doi:10.1109/iswta.2014.6981173

Cited by 13 publications

(10 citation statements)

References 6 publications

(7 reference statements)

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“…Owing to the movement of the human body, the distance between antenna and human body would be changed. Hence, the simulated |S 11 With reference to Figure 11a, the proposed antenna has a robust impedance matching even though there is a big fluctuation of the separation distance. As shown in Figure 11b, the AR bandwidth of the antenna is decreased as the antenna gets close to the phantom.…”

Section: Influence Of Human Bodymentioning

confidence: 99%

“…Owing to the movement of the human body, the distance between antenna and human body would be changed. Hence, the simulated |S 11 -759…”

Section: Influence Of Human Bodymentioning

confidence: 99%

“…Simulated and measured |S 11 | of the proposed antenna in different scenarios F I G U R E 2 2 Measured |S 11 | of the proposed antenna on pork and on different parts of human body YANG ET AL.-11 …”

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confidence: 99%

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Flexible circularly polarized antenna with axial ratio bandwidth enhancement for off‐body communications

Yang

Liu

Fan

et al. 2021

IET Microwaves Antenna & Prop

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A flexible circularly polarized (CP) wearable antenna is proposed for a wireless body area network at the 5.8-GHz industrial, scientific, and medical band. The proposed antenna is made of flexible polyimide and foam material. The CP radiation is enabled by loading two pairs of shorting pins on a rectangular patch antenna. The 3-dB axial ratio (AR) bandwidth is doubled by adding two inverted L-shaped parasitic stubs on both sides of the antenna. For validation, the antenna with the dimensions of 0.68λ 0 � 0.68λ 0 � 0.044λ 0 was fabricated and measured invariousscenarios with an impedancebandwidth of 6.6% (5.67-6.05GHz), an AR bandwidth of 3.85% (5.730-5.955GHz),and a peak gain of 7.2 dBi.The measured radiation in the off-body direction is achieved with a half-power beamwidth of 65°and a 3-dB AR beamwidth of 84°. With the specified input power of 100 mW, the specific absorption rates are 0.613 and 0.294 W/kg in 1-g and 10-g average tissues. Moreover, through analysing the link budget a reliable communication can be guaranteed within 20 m in indoor line-of-sight environments.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Influence Of Human Bodymentioning

confidence: 99%

“…Owing to the movement of the human body, the distance between antenna and human body would be changed. Hence, the simulated |S 11 -759…”

Section: Influence Of Human Bodymentioning

confidence: 99%

See 1 more Smart Citation

Flexible circularly polarized antenna with axial ratio bandwidth enhancement for off‐body communications

Yang

Liu

Fan

et al. 2021

IET Microwaves Antenna & Prop

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“…Here, CPW feeding technique is used to excite the antenna. The advantage of using CPW-feed is to place it in close proximity to the human body surface as compared to bottom fed topologies that have been considered in reported CP wearable patch antennas [28,39,40]. In Stage-1, a circularly polarized monopole antenna with a resonance frequency close to that of the AMC is targeted.…”

Section: Antenna Designmentioning

confidence: 99%

A Compact Low Sar and High Gain Circularly Polarized Amc Integrated Monopole Antenna for Wban Applications

Sahu¹,

Mishra²

2021

PIER C

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This paper presents a compact CPW fed circularly polarized AMC integrated monopole antenna with low SAR and high gain for 2.4 GHz WBAN applications. The proposed design is achieved through a four-stage progression. Stage-1 consists of a straight monopole with an extended vertical stub at one of the ground planes to generate circular polarization. In Stage-2, a novel 3 × 3 ring-type isotropic AMC is implemented beneath the monopole antenna to mitigate the antenna's back radiations towards the human body. On the body at '0' mm distance, it reduces the SAR by 99.47% and increases the impedance bandwidth, radiation efficiency, and gain to 480 MHz, 77%, and 7.1 dBi, respectively. However, there is a decrease in AR bandwidth that indicates AR > 3-dB, which is compensated in Stage-3 by optimizing the monopole. The optimization results in an AR BW of 190 MHz and a size reduction of monopole antenna by 30.862%. Due to the size reduction of monopole with same AMC, the SAR reduction and peak gain are improved to 99.63% and 7.4 dBi, respectively. In Stage-4, the 3× 3 AMC is replaced by 2 × 2 AMC, resulting in the total size and SAR reduction of 55.56% and 97.72%, respectively. Stage-4 provides a simulated impedance bandwidth of 350 MHz, peak gain of 6.4 dBi and AR bandwidth of 170 MHz, whereas the fabricated structure on felt substrate provides 650 MHz, 6.5 dBi, and 150 MHz, respectively.

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“…Moreover, the microstrip patch antenna has b een u sed fo r wid eb and, narrowband, and multiband purposes. These kinds of antennas are mostly used in the applications of wireless communication, radar, some satellite communication, spacecraft [3], wearable devices [4], and medical applications [5], and so on. Antenna polarization, one of the most vital factors in wave propagation between transmittin g an d receiv in g antennas, is divided into three types: linear, elliptical, and circular polarizations [6].…”

Section: Introductionmentioning

confidence: 99%

Compact Circularly Polarized Slotted Symmetric V slits Microstrip Patch Antenna for ISM Band Applications

Wah

Tun²

2020

AJAS

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This paper presents a short microstrip patch antenna and analyzes its characteristics in simulation and measured ways. The proposed antenna is meant to be used from 2.4 to 2.5 GHz at the resonant frequency of 2.45 GHz Industrial, Science, and Medical (ISM) spectrum. Besides, insert a diagonal slot in the main patch, and two cutting edges with V-slit gives the antenna to propagate a circular polarization pattern. The paper aims to start learning a simple C.P. patch antenna supported the basic concept of microstrip antenna theory. A single-feed C.P., truncated corners, and slit and slot methods are employed to model the antenna apart from its parametric study. The substrate material of the developed antenna is FR-4, and it's a relative permittivity of 4.4. The antenna incorporates a compact overall size of 0.389λ0 × 0.389λ0 × 0.013λ0, where λ0 is that the corresponding free-space wavelength at 2.45 GHz. FEKO has been used for not only designing the antenna model but also analyzing its performances. Simulated and measured results have reported that the antenna can work in ISM bands (2.42-2.5 GHz) with VSWR< 2, low realized gain, and the limited 3-dB axial ratio at 2.45 GHz.

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Compact circularly polarized textile antenna

Cited by 13 publications

References 6 publications

Flexible circularly polarized antenna with axial ratio bandwidth enhancement for off‐body communications

Flexible circularly polarized antenna with axial ratio bandwidth enhancement for off‐body communications

A Compact Low Sar and High Gain Circularly Polarized Amc Integrated Monopole Antenna for Wban Applications

Compact Circularly Polarized Slotted Symmetric V slits Microstrip Patch Antenna for ISM Band Applications

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