Substrate integrated waveguide textile antennas as energy harvesting platforms

Rogier, Hendrik

doi:10.1109/iwat.2015.7365349

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…Finally, a compact and highly integrated wearable textile SIW antenna system was presented in [72]. This compact system was integrated on two flexible solar cells, a flexible power management system, and a microenergy cell.…”

Section: 3mentioning

confidence: 99%

Material Selection and Fabrication Processes for Flexible Conformal Antennas

Monne

Lan

Chen

2018

International Journal of Antennas and Propagation

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Flexible antennas offer many advantages for communication, radar, RF identification, and energy harvesting applications. A review on the material selection and fabrication process of flexible antennas is presented since these aspects are critical to the antenna’s overall electrical and mechanical performance. A number of different material and fabrication techniques are reviewed in detail for different types of antennas. In addition, experimental results are also discussed for these antennas, which further underlines the importance of material selection and the various fabrication processes.

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Section: 3mentioning

confidence: 99%

Material Selection and Fabrication Processes for Flexible Conformal Antennas

Monne

Lan

Chen

2018

International Journal of Antennas and Propagation

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“…A waveguide slot antenna realized of textile-filled waveguide was introduced in [ 17 ], yet the waveguide walls were realized of copper foil which is impractical for wearable applications. Some authors proposed the application of a Surface Integrated Waveguide (SIW) realized in textile as Textile Integrated Waveguides (TIW) [ 18 , 19 , 20 , 21 ]. However, TIW is usable at higher frequencies determined by the thickness of the used textile, while for lower frequencies multiple textile layers can result in a bulky design.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to designs in [ 18 , 19 , 20 ], the considered waveguide antenna is fully realized using conductive fabric and sewing manufacturing procedure which represent the most natural way of making textile objects. In this way, the proposed antenna could easily be attached to a jacket, vest, belt, or another article of clothing.…”

Section: Introductionmentioning

confidence: 99%

Textile Slotted Waveguide Antennas for Body-Centric Applications

Mikulić

Sopp

Bonefačić

et al. 2022

Sensors

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One of the major challenges in the development of wearable antennas is to design an antenna that can at the same time satisfy technical requirements, be aesthetically acceptable, and be suitable for wearable applications. In this paper, a novel wearable antenna is proposed—textile realization of a slotted waveguide antenna. The antenna is realized using conductive fabric to manufacture the walls of a rectangular waveguide in which the slots were cut out. All connections and cuts are sewn with conductive thread taking over advantages of the traditional process of manufacturing textile objects. The developed slotted waveguide array prototype, containing three slots and designed for operation in the 5.8-GHz ISM band, is experimentally characterized and compared to an equivalent metallic antenna. The achieved operating bandwidth is larger than 300 MHz in both cases. The measured gain of a textile slotted waveguide array is around 9 dBi with a radiation efficiency larger than 50% in the whole operating bandwidth, i.e., the textile array showed a 2 dB lower gain in comparison to the metallic counterpart. The gain is stable in the whole bandwidth and the radiation patterns do not differ. The results demonstrated that such textile antennas are suitable for body-centric communication and sensor systems and can be integrated into clothing, e.g., into a smart safety vest or into a uniform. Further analysis of various realizations of slotted waveguide antennas is presented showing that different versions of the proposed antenna can be used in all three off-body, on-body, and in-body communication scenarios.

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“…Hence, our design significantly reduces the required amount of RFID readers to cover an entire building. Moreover, compared with the ad hoc antenna/harvester codesign strategy in [9], [36], and [37], our novel microwave system design paradigm also includes the integration of the transceiver, microcontroller, memory, and sensor hardware. This holistic approach leads to enhanced system autonomy, as the power consumption profile is now tailored to the power generation profile of the solar harvester by means of a dedicated algorithm.…”

mentioning

confidence: 99%

“…This holistic approach leads to enhanced system autonomy, as the power consumption profile is now tailored to the power generation profile of the solar harvester by means of a dedicated algorithm. In addition, the tag now relies on a circular patch antenna that exploits shorted posts to tailor its radiation pattern for application in the smart floor/ceiling concept, instead of an SIW cavity-backed slot textile antenna that envisions body-to-body communication as in [9], [36], and [37].…”

mentioning

confidence: 99%

Wearable Flexible Lightweight Modular RFID Tag With Integrated Energy Harvester

Lemey

Agneessens

Torre

et al. 2016

IEEE Trans. Microwave Theory Techn.

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Abstract-A novel wearable radio frequency identification (RFID) tag with sensing, processing, and decision-taking capability is presented for operation in the 2.45-GHz RFID superhigh frequency (SHF) band. The tag is powered by an integrated light harvester, with a flexible battery serving as an energy buffer. The proposed active tag features excellent wearability, very high read range, enhanced functionality, flexible interfacing with diverse low-power sensors, and extended system autonomy through an innovative holistic microwave system design paradigm that takes antenna design into consideration from the very early stages. Specifically, a dedicated textile shorted circular patch antenna with monopolar radiation pattern is designed and optimized for highly efficient and stable operation within the frequency band of operation. In this process, the textile antenna's functionality is augmented by reusing its surface as an integration platform for light-energy-harvesting, sensing, processing, and transceiver hardware, without sacrificing antenna performance or the wearer's comfort. The RFID tag is validated by measuring its stand-alone and on-body characteristics in free-space conditions. Moreover, measurements in a real-world scenario demonstrate an indoor read range up to 23 m in nonlineof-sight indoor propagation conditions, enabling interrogation by a reader situated in another room. In addition, the RFID platform only consumes 168.3 µW, when sensing and processing are performed every 60 s.Index Terms-Battery-assisted, energy harvesting, Internet of Things (IoT), radio frequency identification (RFID), textile antenna, wearable.

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Substrate integrated waveguide textile antennas as energy harvesting platforms

Cited by 8 publications

References 8 publications

Material Selection and Fabrication Processes for Flexible Conformal Antennas

Material Selection and Fabrication Processes for Flexible Conformal Antennas

Textile Slotted Waveguide Antennas for Body-Centric Applications

Wearable Flexible Lightweight Modular RFID Tag With Integrated Energy Harvester

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