A Wearable, Low-Profile, Fractal Monopole Antenna Integrated with a Reflector for Enhancing Antenna Performance and SAR Reduction

Atanasov, Nikolay; Atanasova, Gabriela; Stefanov, A.; Nedialkov, Ivan

doi:10.1109/imws-amp.2019.8880142

Cited by 17 publications

(11 citation statements)

References 9 publications

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“…There is no single specific type of geometry for wearable antennas. The most prevalent types are dipole [ 5 , 8 ], monopole [ 1 , 10 , 12 , 14 , 15 , 16 , 17 ] and patch antennas [ 7 , 9 , 11 ]. The choice of geometry needs to be guided from the design requirements such as simple structure, small size, low-profile and light-weight.…”

Section: Design Fabrication and Measurement Of Small Antennas Formentioning

confidence: 99%

“…Moreover, small, flexible, low-profile, and light-weight wearable antennas based on materials which are deformable, twistable and stretchable are needed because the sensor node needs to be seamlessly worn [ 7 ]. Most of the proposed flexible wearable antennas are based on polymers [ 5 , 8 , 9 ], textiles [ 1 , 7 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] or flexible ceramics [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…One popular technique to reduce electromagnetic coupling between the antenna and human body is to use metamaterials such as electromagnetic bandgap [ 10 , 11 , 12 , 13 , 14 ] and artificial magnetic conducting surfaces [ 16 , 17 ]. Another technique is to use a reflector [ 1 , 5 , 8 , 15 ] or a full ground plane [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Also an essential aspect would be considered when designing antennas for wearable sensor nodes is miniaturization. Most of the proposed antenna designs still suffer from relatively large size [ 1 , 9 , 14 , 15 , 16 , 17 ] or high profile [ 5 , 10 , 11 , 12 ] and do not meet the requirements (for low-profile and small size) of the antennas for wearable wireless sensor nodes. Consequently, the design of antennas for wearable wireless sensor nodes is a complex task.…”

Section: Introductionmentioning

confidence: 99%

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Small Antennas for Wearable Sensor Networks: Impact of the Electromagnetic Properties of the Textiles on Antenna Performance

Atanasova

Atanasov

2020

Sensors

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The rapid development of wearable wireless sensor networks (W-WSNs) has created high demand for small and flexible antennas. In this paper, we present small, flexible, low-profile, light-weight all-textile antennas for application in W-WSNs and investigate the impact of the textile materials on the antenna performance. A step-by-step procedure for design, fabrication and measurement of small wearable backed antennas for application in W-WSNs is also suggested. Based on the procedure, an antenna on a denim substrate is designed as a benchmark. It demonstrates very small dimensions and a low-profile, all while achieving a bandwidth (|S11| < −6 dB) of 285 MHz from 2.266 to 2.551 GHz, radiation efficiency more than 12% in free space and more than 6% on the phantom. Also, the peak 10 g average SAR is 0.15 W/kg. The performance of the prototype of the proposed antenna was also evaluated using an active test. To investigate the impact of the textile materials on the antenna performance, the antenna geometry was studied on cotton, polyamide-elastane and polyester substrates. It has been observed that the lower the loss tangent of the substrate material, the narrower the bandwidth. Moreover, the higher the loss tangent of the substrate, the lower the radiation efficiency and SAR.

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Section: Design Fabrication and Measurement Of Small Antennas Formentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Small Antennas for Wearable Sensor Networks: Impact of the Electromagnetic Properties of the Textiles on Antenna Performance

Atanasova

Atanasov

2020

Sensors

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“…Then, five antennas were manufactured by a cost-effective and time-saving fabrication technique, as described in [28]. The radiating elements of the antennas were built using a highly conductive woven fabric P1168 (supplied by Adafruit, Italy) with a thickness of 0.08 mm and sheet resistance of 0.05 Ω/sq.…”

Section: Effect Of Textile Substrate Electromagnetic Property Variatimentioning

confidence: 99%

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Atanasov¹,

Atanasova²,

Atanasov³

2020

Modern Printed-Circuit Antennas

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This chapter provides a brief overview of the types of wearable antennas with high body-antenna isolation. The main parameters and characteristics of wearable antennas and their design requirements are discussed. Next, procedures (passive and active) to test the performance of wearable antennas are presented. The electromagnetic properties of the commercially available textiles used as antenna substrates are investigated and summarized here, followed by a more detailed examination of their effects on the performance of wearable antennas with high body-antenna isolation. A trade-off between substrate electromagnetic properties and resonant frequency, bandwidth, radiation efficiency, and maximum gain is presented. Finally, a case study is presented with detailed analyses and investigations of the low-profile all-textile wearable antennas with high body-antenna isolation and low SAR. Their interaction with a semisolid homogeneous human body phantom is discussed. The simulations and experimental results from different (in free-space and on-body) scenarios are presented.

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Impact of Fractal Geometry on Microstrip Patch Antenna at Futuristic Frequencies

Raghavendra

Kakkar

2022

Lecture Notes in Electrical Engineering

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A Wearable, Low-Profile, Fractal Monopole Antenna Integrated with a Reflector for Enhancing Antenna Performance and SAR Reduction

Cited by 17 publications

References 9 publications

Small Antennas for Wearable Sensor Networks: Impact of the Electromagnetic Properties of the Textiles on Antenna Performance

Small Antennas for Wearable Sensor Networks: Impact of the Electromagnetic Properties of the Textiles on Antenna Performance

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Impact of Fractal Geometry on Microstrip Patch Antenna at Futuristic Frequencies

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