Wearable textile patch antenna for on-body communications

Parmar, Chirag; Joshi, Sweety H.

doi:10.1109/gcct.2015.7342796

Cited by 11 publications

(7 citation statements)

References 10 publications

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“…S 11 in an antenna is a parameter that states the total of power that is lost or delivered to the load and does not return as a reflection. Ideally, the antenna should achieve the S 11 of the antenna lower than -10 dB to obtain a good performance [2]. Figure 10 depicts the simulation of S 11 parameter in terms of magnitude in decibel (dB) and phase in degree of the designed textile microstrip patch antenna array.…”

Section: Resultsmentioning

confidence: 99%

“…The jeans fabric has the thickness, h of 1.00 mm, dielectric constant or relative permittivity, of 1.716, and dissipation factor or loss tangent, of 0.025, respectively [12]. By having the < 2.00, the wearable microstrip patch antenna can produce an acceptable efficiency and a high gain [2]. Table 1 show the specifications of textile materials used as the conductive and substrate in this study.…”

Section: Antenna Structure and Design 21 Types Of Textile Materialsmentioning

confidence: 99%

“…In order to support the WBAN, many research efforts being focused on wearable antenna development. Precisely, wearable antennas are becoming more and more lightweight that can be integrated [2] or attached to clothing e.g. jacket to improve wireless communication links [3].…”

Section: Introductionmentioning

confidence: 99%

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2.45 GHz wearable rectenna array design for microwave energy harvesting

Shawalil

Rani

Rahim

2019

IJEECS

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This paper presents a design of a wearable textile microstrip patch rectifying antenna (rectenna) array operating for wireless body area network (WBAN) at the center frequency, fc of 2.45 GHz. Precisely, jeans or denim with the relative permittivity, = 1.70 and thickness of 1.00 mm is chosen as a substrate attached to SheildIt Super as a conductive material with the thickness, h of 0.17 mm and conductivity of 6.67 105 S/m, respectively. In the first stage, a microstrip patch antenna array layout with the inset fed technique is designed and simulated by using the Keysight Advanced Design System (ADS) software. In the second stage, a wearable textile microstrip patch antenna array is fabricated, integrated, and hidden inside the jeans fabric. In the third stage, the rectifier circuit layout on the flame retardant-4 (FR-4) printed circuit board (PCB) with the dielectric constant, = 4.7, thickness, h = 1.6 mm, and loss tangent, δ = 0.018 that can generate radio frequency-direct current (RF-DC) conversion is designed and simulated using the ADS software Each simulation result and fabrication measurement shows that the designed antenna array characteristics are suitable for an industrial, scientific, and medical radio (ISM) band by having the reflection coefficient, S11 less than -10 decibel (dB) at the respective resonant frequency, fr. Moreover, through simulation, the output DC voltage for the bridge rectifier circuit is from 132 mV to 5.01 V with the corresponding power conversion efficiency (PCE) between 3.48% and 50.20% whereas for the voltage doubler rectifier, the output DC voltage is from 417 mV to 2.91 V with the corresponding PCE between 34.78% and 53.56%, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Antenna Structure and Design 21 Types Of Textile Materialsmentioning

confidence: 99%

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2.45 GHz wearable rectenna array design for microwave energy harvesting

Shawalil

Rani

Rahim

2019

IJEECS

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“…51 ground plane patch antenna affects a reduction in the back radiation antenna when positioned on the body. 53 It is evident that the optimal choice for wearable antennas is the microstrip patch antenna.…”

Section: Wearable Electro-textile Designmentioning

confidence: 99%

Electro-textile wearable antennas in wireless body area networks: materials, antenna design, manufacturing techniques, and human body consideration—a review

Almohammed

Ismail

2020

Textile Research Journal

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The latest progress in the emerging wireless technology has resulted in the development of wearable antennas made of various fabrics. This unique antenna is an integral part of the wireless body area network (WBAN). A wide range of applications are made by the wearable antennas in the fields of the Internet of Things, sport, defense, public safety, telemedicine, navigation, and tracking. The focus point of the current review is the recent progress of electro-textiles research with special attention on the materials properties, criteria, and manufacturing techniques. Existing as well as upcoming materials specifically and potentially used for electro-textile fabrication are discussed. Various manufacturing techniques are discussed to match the importance of material selection. The current work highlights the performance when the antennas tagging are applied in WBAN objects and illustrates how the human body affects the performance of the wearable antenna and vice versa. The findings of this review by introducing the best materials, techniques, and designs could be used in future to provide high-performance materials for body-centric applications.

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“…For instance, the efficiency and bandwidth of the antenna are affected by the thickness and dielectric constant of the substrate material [18]. Moreover, wearable antennas are becoming lighter in terms of weight and can be integrated into or hidden inside clothing [19] or attached to clothing to improve wireless communication links [20]. Wireless Body Area networks (WBANs) are becoming increasingly crucial and play an important role in wireless communications systems.…”

mentioning

confidence: 99%

A 2.45 GHz Semi-Flexible wearable antenna for industrial, scientific and medical band applications

Shah

Kadir

Abidin

et al. 2019

IJEECS

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In this work, a compact size, wearable microstrip patch antenna is designed, simulated and fabricated for the Industrial, Scientific and Medical (ISM) band applications with the operating frequency at 2.45 GHz. A semi-flexible substrate material which is Rogers Duroid RO3003™ with a relative dielectric constant, ε_r of 3, loss tangent, tan δ of 0.010 and thickness, h of 1.52 mm has been proposed to ensure it can be worn on clothes. The antenna has a low-profile feature with 24 × 28 mm2 in dimension. Investigation of the antenna under bending condition on the approximate human arm size is also performed and analysed to ensure that the wearable antenna is applicable for on-body. The bending investigation shows that the initial resonant frequency of 2.45 GHz is shifted to 2.3 GHz. However, the reflection coefficient at 2.45 GHz is still greater than the -10-dB which implies that the antenna is still functional at that particular frequency. The Specific Absorption Rate (SAR) of the antenna has also been simulated to examine whether the antenna obeys the SAR limits under the FCC and CNIRP guidelines. The SAR values obtained show that the antenna obeys the standard for 1 mW input power. The SAR value for 1g of human tissue is computed at 0.03999 W/kg (FCC standard: 1.6 W/kg) while for 10g is at 0.01936W/kg (CNIRP standard: 2 W/kg).

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Wearable textile patch antenna for on-body communications

Cited by 11 publications

References 10 publications

2.45 GHz wearable rectenna array design for microwave energy harvesting

2.45 GHz wearable rectenna array design for microwave energy harvesting

Electro-textile wearable antennas in wireless body area networks: materials, antenna design, manufacturing techniques, and human body consideration—a review

A 2.45 GHz Semi-Flexible wearable antenna for industrial, scientific and medical band applications

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