Robust and Efficient Integrated Antenna With EBG-DGS Enabled Wide Bandwidth for Wearable Medical Device Applications

Ashyap, Adel Y. I.; Dahlan, Samsul Haimi; Abidin, Zuhairiah Zainal; Dahri, M. Hashim; Majid, H. A.; Kamarudin, M. R.; Yee, See Khee; Jamaluddin, Mohd Haizal; Alomainy, Akram; Abbasi, Qammer H.

doi:10.1109/access.2020.2981867

Cited by 58 publications

(53 citation statements)

References 30 publications

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“…A comparison with previously reported designs shows that the overall size of each of the four proposed antennas is between 25% and 90% smaller than the antennas in [ 1 , 9 , 10 , 12 , 14 , 15 , 26 ]. Moreover, the proposed antennas have a lower profile than [ 5 , 8 , 10 , 11 , 12 , 14 ].…”

Section: Impact Of Em Properties Of the Textile Materials On The Pmentioning

confidence: 89%

“…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%

“…In the literature, a diverse range of techniques have been reported for reducing interaction between the antenna and human tissue. 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: Impact Of Em Properties Of the Textile Materials On The Pmentioning

confidence: 89%

Section: Design Fabrication and Measurement Of Small Antennas Formentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 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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Performance evaluation of compact FSS‐integrated flexible monopole antenna for body area communication applications

Sugumaran

Balasubramanian

Palaniswamy

2022

Int J Communication

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Summary This article presents a compact wearable antenna integrated with a novel frequency selective surface (FSS) made of textile materials. The antenna can be applied in wearable health monitoring applications aimed at the 2.45‐GHz Industrial Scientific and Medical (ISM) band. An array of 4 × 4 octagonal slot‐shaped FSS (106 × 106 mm2) superstrate enhances the performance of the modified Koch curve planar monopole antenna (44.85 × 39 mm2). The Jeans substrate prototype with the overall dimensions of 1.128λ0 × 1.128λ0 × 0.319λ0 covers the bandwidth of 2.45‐GHz ISM band from 2.24 to 2.76 GHz (S11 ≤ −10 dB). The band rejection and reflective nature of the proposed FSS suppress the back radiation and improves the antenna's gain by −20 dB and 6.3 dBi, respectively. The specific absorption rate (SAR) level is reduced to 0.445 W/kg from 24.995 W/kg with a higher reduction rate of 98.21%. Many literature reports produced higher gain and lower SAR but exhibited reduced efficiency when the antenna is placed near the human body. The wearable antenna's frequency response tends to vary under bending conditions for narrowband antennas. Wide‐band monopole antennas produce omnidirectional radiation pattern which tends to affect human body tissues. So stable polarization‐insensitive FSS is placed behind the antenna to enhance the antenna's gain and avoid back radiation. The proposed antenna exhibits stable performance under bending conditions with fractional bandwidth of 22.2%, gain of 8.83 dBi, and produces a better efficiency of 91.30% when the antenna is positioned in the vicinity with human body models. The experimental validation shows that the proposed antenna is a promising candidate for wireless body area networks.

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Compact bio‐inspired dual‐band uniplanar electromagnetic bandgap‐backed antenna for wearable applications

Abolade¹,

Konditi

Dharmadhikary

2021

Int J RF Mic Comp-Aid Eng

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A compact bio‐inspired electromagnetic bandgap integrated wearable antenna (Bio‐EBG‐iwA) is proposed in this work. The Bio‐EBG‐iwA is based on the hybridization of semi‐Vitis vinifera leaf‐shaped patch, asymmetric feedline, reflected G‐shaped slot, partial ground, and a stub on the ground plane. The antenna is built on the locally made textile material called Aso‐oke (Alari) with permittivity and a loss tangent of 1.43 and 0.019, respectively. The dimension of the proposed antenna is 0.20.25emλg×0.10.25emλg×0.00890.25emλg (22 mm × 12 mm × 0.7 mm) at 2.45 GHz. Despite its compactness, the gain of −0.48 and 2.5 dBi are achieved at 2.45 and 5.7 GHz respectively without electromagnetic bandgap (EBG). A dual‐band textile‐based uniplanar compact electromagnetic bandgap (UC‐EBG) is introduced to create isolation between the human tissue and the antenna. The dual‐band UC‐EBG is realized through the use of a modified slitted‐square ring (MSSR) and the 90° rotated H‐shaped patch on Aso‐oke (Alari) with a thickness of 2.1 mm. The periodicity of the proposed UC‐EBG is 34.5 mm. The antenna is placed on a 2 × 2 array of the proposed UC‐EBG separated by a 3 mm foam thickness. The radiation efficiency of 88.97% and 79.85% are achieved at 2.45 and 5.7 GHz respectively. The gain of the proposed UC‐EBG integrated antenna increased from −0.48 and 2.5 dBi to 5.9 and 10.7 dBi at 2.45 and 5.7 GHz, respectively. The front‐to‐back ratio (FBR) of 26.3 dB is achieved with the use of UC‐EBG. The use of UC‐EBG results in a 98.31% and 99.4% reduction in average SAR at 2.45 and 5.7 GHz, respectively. The off‐body and on‐body performance analysis of the proposed UC‐EBG integrated antenna show that the proposed EBG integrated antenna (Bio‐EBG‐iwA) is a suitable candidate for wearable application. To the best of our knowledge, this is the most compact wearable antenna with suitable gain, radiation efficiency, and high FBR. In addition, our proposed UC‐EBG shows that slitting is an effective way of miniaturizing the EBG structure.

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Robust and Efficient Integrated Antenna With EBG-DGS Enabled Wide Bandwidth for Wearable Medical Device Applications

Cited by 58 publications

References 30 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

Performance evaluation of compact FSS‐integrated flexible monopole antenna for body area communication applications

Compact bio‐inspired dual‐band uniplanar electromagnetic bandgap‐backed antenna for wearable applications

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