Improving wearable slot antenna performance with EBG structures

Duan, Z.; Linton, D.; Scanlon, William; Conway, Gareth A.

doi:10.1109/lapc.2008.4516894

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…This led to research to reduce the size of these EBG structures [34,35]. Many researchers proposed the use of these EBG structures for wearable antennas [36]. However, these EBG structures were rigid and brittle and thus considered not suitable for wearable applications.…”

Section: Related Workmentioning

confidence: 99%

Performance Enhancement of Wearable Antenna Using High Impedance Surfaces

Bashir

Khan²,

Jan³

et al. 2022

Int. j. commun. netw. inf. secur.

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This paper presents a novel textile wearable antenna that has been designed to operate at Wi-Fi bands of 2.4GHz & 5.8GHz. Antenna performance in free space environment showed Gain of 1.8dBi at 2.4GHz and 4.5dBi at 5.8GHz. However, performance deteriorated when antenna was operated near human body which is lossy and complex in nature. For mitigating the human body effect on antenna performance, high impedance surface (HIS) was designed and integrated with this textile antenna. Due to shielding effect of HIS, antenna Gain increased to 8dBi at 2.4GHz and 9dBi at 5.8GHz. The SAR values were also reduced to 0.682W/Kg at 2.4GHz and 0.0692W/Kg at 5.8GHz for 10g tissue. The proposed antenna was also tested under bending and crumpling conditions. It was observed that antenna performance was not significantly deteriorated. The proposed textile antenna can have exciting applications in emerging wearable technologies.

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Section: Related Workmentioning

confidence: 99%

Performance Enhancement of Wearable Antenna Using High Impedance Surfaces

Bashir

Khan²,

Jan³

et al. 2022

Int. j. commun. netw. inf. secur.

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show abstract

“…Antenna design for body centric communications is predominantly reported for upper body applications [1][2][3][4][5][6]. While some research describes antennas for placement near ankles [7], antennas for footwear telemetry links are not detailed.…”

Section: Introductionmentioning

confidence: 99%

Footwear Antennas for Body Area Telemetry

Gaetano¹,

McEvoy²,

Ammann³

et al. 2013

IEEE Trans. Antennas Propagat.

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Abstract-Antennas designed to link footwear sensors within body centric networks are introduced with two small UWB antennas, one directional and another quasi-omnidirectional. The radiating characteristics are evaluated for three positions on a sample sports shoe using a detailed simulation model and measurements with a homogenous foot phantom. Antenna performance is assessed for resilience to close proximity loading by the footwear materials and the phantom foot.

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“…So, the interfering effects need to be considered while designing the wearable antennas for body-worn applications. Periodic metamaterial AMC surfaces have been previously integrated with the boresight radiation antennas to reduce their back radiation and make antennas tolerant to positioning on human body for single and multi-band wearable antennas [1] − [3].…”

Section: Introductionmentioning

confidence: 99%

Latex based near-endfire wearable antenna backed by AMC surface

Agarwal

Guo

Salam

et al. 2013

2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applicati

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A near-endfire, artificial magnetic conductor (AMC) backed wearable antenna is proposed in this paper for wireless body area networks operating in the 2.4 GHz ISM band. The bidirectional-endfire radiation pattern of Yagi-Uda latex antenna is changed to off-axis near-endfire radiation using an AMC reflector also printed on latex. The antenna is separated from upper AMC surface using flexible Styrofoam of thickness 0.044λ o at 2.4 GHz for best compromise between keeping the antenna structure low-profile and achieving an off-axis beam tilt radiation of ~74 o towards end-fire direction. 0 o reflection phase AMC surface is proposed to reduce downward radiations and consequently improve the antenna tolerance to positioning on the human body, and reduce the specific absorption rate (SAR) level for 2.4 GHz frequency band gap. Antenna performance in terms of return loss, radiation efficiency, extent of frequency detuning, gain and SAR level are studied for free space as well as CST MWS tissue-equivalent voxel model for proposed antenna design. The Yagi-Uda antenna backed with AMC reflector demonstrates the measured return loss bandwidth of 40 MHz (2.43−2.47 GHz) and gain of -0.2 dBi in endfire direction with improved on-body radiation efficiency of 74.82 % and reduced peak SAR level of 1.24 W/kg for 10 g tissue for the compact overall flexible latex antenna volume of 0.4λ o × 0.4λ o × 0.076λ o at 2.4 GHz.Index Terms -Artificial magnetic conductor reflector, bodyworn antennas, endfire radiation, on-body communications, specific absorption rate, voxel model.

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Improving wearable slot antenna performance with EBG structures

Cited by 11 publications

References 9 publications

Performance Enhancement of Wearable Antenna Using High Impedance Surfaces

Performance Enhancement of Wearable Antenna Using High Impedance Surfaces

Footwear Antennas for Body Area Telemetry

Latex based near-endfire wearable antenna backed by AMC surface

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