Ambient RF Energy Harvesting From a Two-Way Talk Radio for Flexible Wearable Wireless Sensor Devices Utilizing Inkjet Printing Technologies

Bito, Jo; Hester, Jimmy; Tentzeris, Manos M.

doi:10.1109/tmtt.2015.2495289

Cited by 68 publications

(42 citation statements)

References 23 publications

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“…A RFEH system, composed of conductive traces on a lowcost substrate and a passive rectifier, fulfils the materialrequirements in a textile-based system. Wearable rectennas have been presented using additive manufacturing [8], metallized conductive fabrics [3], and flexible etched Printed Circuit Board (PCB)s [9]. Nevertheless, most reported rectennas were not concealed in the textile for durability, and often rely on certain substrates, such as thick felt fabric to improve the efficiency of patch antennas and a rectifier on a rigid PCB [3].…”

Section: Radio Frequency Energy Harvesting (Rfeh) and Wirelessmentioning

confidence: 99%

Sub-1 GHz Flexible Concealed Rectenna Yarn for High-Efficiency Wireless-Powered Electronic Textiles

Wagih

Weddell

Beeby

2020

2020 14th European Conference on Antennas and Propagation (EuCAP)

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Electronic textiles and seamlessly integrated flexible wearable electronics are an emerging platform for sensing and computing. Batteries and energy harvesters relying on specific materials and transducers are not fully compatible with e-textiles fabrication and large-scale manufacturing. This work proposes a radio frequency energy harvesting rectenna, operating in the sub-1 GHz license-free band, packaged in the form a of rectenna yarn which can be concealed in standard textile weaves. The rectenna yarn is fabricated using thin polyimide copper laminates using photolithography. The rectenna is composed of a 50Ω meanderline coplanar waveguide monopole antenna and a voltage doubler rectifier, with a lumped matching network. The rectenna achieves 65.8% RF-DC efficiency and a 8.0-V DC output at 6 and 11 dBm input power, respectively. This is the highest voltage output of a textile wearable rectenna, while maintaining high efficiency down to −20 dBm and a −7 dBm 1-V sensitivity.

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Section: Radio Frequency Energy Harvesting (Rfeh) and Wirelessmentioning

confidence: 99%

Sub-1 GHz Flexible Concealed Rectenna Yarn for High-Efficiency Wireless-Powered Electronic Textiles

Wagih

Weddell

Beeby

2020

2020 14th European Conference on Antennas and Propagation (EuCAP)

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“…The devices had open-circuit voltages of 0.71 V and energy conversion efficiency of 7.13% [ 194 ]. Besides the solar cell, other energy harvesters that have potential but have not yet been well-studied in stretchable electronics include piezoelectric motion energy harvesters [ 195 , 196 ], RF energy harvesters [ 60 , 197 , 198 ], the thermal energy harvester [ 199 ], and triboelectric energy harvester [ 200 ].…”

Section: Applicable Devicesmentioning

confidence: 99%

Materials, Mechanics, and Patterning Techniques for Elastomer-Based Stretchable Conductors

Mahajan

Shou

et al. 2016

Micromachines

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Stretchable electronics represent a new generation of electronics that utilize soft, deformable elastomers as the substrate or matrix instead of the traditional rigid printed circuit boards. As the most essential component of stretchable electronics, the conductors should meet the requirements for both high conductivity and the capability to maintain conductive under large deformations such as bending, twisting, stretching, and compressing. This review summarizes recent progresses in various aspects of this fascinating and challenging area, including materials for supporting elastomers and electrical conductors, unique designs and stretching mechanics, and the subtractive and additive patterning techniques. The applications are discussed along with functional devices based on these conductors. Finally, the review is concluded with the current limitations, challenges, and future directions of stretchable conductors.

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“…Noting that it's the first time the proposed RF EH utilizes not only the dc power but also the second harmonic signal. A wearable EH has also been reported, which can harvest high RF energy and transfer the ''hotspots'' energy into high dc voltage and power [3]. Plus, a wideband and high gain antenna has been proposed for low energy density far-field RF energy harvesting [4].…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional Absorptive Common-Mode Filter Based on Interdigitated Microstrip Coupled Lines for 5G “Green” Communications

Guan

Tentzeris

2020

IEEE Access

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This paper proposes a bidirectional absorptive common-mode filter (A-CMF) for 5G ''green'' communication systems. The A-CMF is a balanced-to-balanced structure using interdigitated coupled lines to replace normal double parallel-coupled lines for enhanced coupling and easy manufacturing. The resistors are introduced to dissipate the common-mode (CM) noises into heat and thus to avoid the noises being reflected and still existing in the communication system. This novel A-CMF features an intrinsic CM noises absorption while maintaining its differential-mode (DM) filtering characteristics. As a proof-of-concept demonstration, one microstrip prototype is fabricated in a two-layer printed circuit board (PCB) and the measurements are consistent with the simulations. The DM signals can pass through this A-CMF without being attenuated from 1.38 GHz to 5.19 GHz but the CM noises are suppressed throughout the broad frequency range between 0.72 GHz and 8 GHz. It is worth noting that this A-CMF realizes a wide band with 90% absorption efficiency of CM noises from 2.18 GHz to 4.97 GHz. INDEX TERMS Absorptive common-mode filter (A-CMF), common-mode (CM), differential-mode (DM), noise absorption, reflectionless filter, green communication.

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Ambient RF Energy Harvesting From a Two-Way Talk Radio for Flexible Wearable Wireless Sensor Devices Utilizing Inkjet Printing Technologies

Cited by 68 publications

References 23 publications

Sub-1 GHz Flexible Concealed Rectenna Yarn for High-Efficiency Wireless-Powered Electronic Textiles

Sub-1 GHz Flexible Concealed Rectenna Yarn for High-Efficiency Wireless-Powered Electronic Textiles

Materials, Mechanics, and Patterning Techniques for Elastomer-Based Stretchable Conductors

A Bidirectional Absorptive Common-Mode Filter Based on Interdigitated Microstrip Coupled Lines for 5G “Green” Communications

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