Inkjet-Printed Microstrip Patch Antennas Realized on Textile for Wearable Applications

Whittow, William G.; Chauraya, Alford; Vardaxoglou, J.C.; Li, Yang; Torah, Russel; Yang, Kai; Beeby, Steve; Tudor, John

doi:10.1109/lawp.2013.2295942

Cited by 154 publications

(133 citation statements)

References 16 publications

(15 reference statements)

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“…The drop spacing was set to 15 µm and a droplet velocity of 8 m/s was chosen for printing the silver to provide good conductivity and line edge definition. Two deposits are required to form a layer which maintains good conductivity during bending of the fabric [6]. The silver ink layer was thermally cured for 10 minutes at 150° C in a box oven.…”

Section: Fabrication Of the Fssmentioning

confidence: 99%

Printed frequency selective surfaces on textiles

Whittow

Torah

et al. 2014

Electron. lett.

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A novel technique for inkjet printing frequency selective surfaces (FSSs) on textiles is introduced. The challenge of printing an inkjet layer of 3 µm thickness on polyester cotton with a surface roughness of the order of 150 µm is achieved with a screen-printed interface layer. The conducting inkjet layer is then printed directly on top of the interface layer. A screen mask was used so that the interface layer was only printed directly below the conducting ink. A square FSS structure has been fabricated and the measured shielding has been compared to simulations.

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Section: Fabrication Of the Fssmentioning

confidence: 99%

Printed frequency selective surfaces on textiles

Whittow

Torah

et al. 2014

Electron. lett.

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“…In addition, washable screenprinted textile antennas for 2.45 GHz ISM band [32][51] and for UHF-RFID tags [34] were introduced in 2012. In 2013, it was demonstrated that textile antennas may be inkjet-printed, provided a screen-printed interface layer is first applied to reduce the surface roughness of the textile substrate [49] [50]. A particularly interesting recent fabrication technique, first introduced in 2012 [53], consists of applying substrate waveguide technology to create cavities in textile substrate by means of rows of eyelets (Figure 4) or by embroidery.…”

Section: B Materials and Technologiesmentioning

confidence: 99%

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

Nepa

Rogier

2015

IEEE Antennas Propag. Mag.

103

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Abstract-An in-depth survey of wearable antennas for offbody radio links in the VHF and UHF frequency bands (below 1 GHz) is presented. The review encompasses distinctive specifications, design criteria and challenges, material characterization procedures, antenna topologies and technologies, multi-antenna systems, dedicated testing procedures, applications and future trends.Index Terms-Wearable antennas, body-worn antennas, textile antennas, embroidered antennas, VHF antennas, UHF antennas, antennas for body-centric communications, antennas for body area networks, antennas for personal area networks, antennas for off-body wireless communications. I. INTRODUCTIONhere are several existing and forthcoming wireless applications that either require or can benefit from one or more antennas that are directly stitched on a piece of clothing or a garment, or integrated into a personal accessory (such as shoes, glasses, buttons, helmets). These antennas are usually referred to as body-worn antennas, textile antennas, BAN (Body Area Network) antennas, antennas for body-centric communications, wearable antennas. The last term is the one that is going to be used in this paper, as it denotes any antenna that is small and light enough to be worn or carried on one's body.In the last decades, hundreds of scientific papers on wearable antennas have been published in the open literature [1]- [8]. Therefore, for the sake of completeness and clarity, a valuable analysis of the state-of-the-art on wearable antennas should be limited to antennas for a specific application, a given frequency range, or a chosen antenna technology. In this context, the present review focuses on wearable antennas operating in the VHF band and part of the UHF frequency band (below 1 GHz). Choosing 1 GHz as an upper boundary for this review is highly relevant, as the operating frequency is usually the main parameter to discriminate among available antenna topologies, technologies and characterization techniques. Moreover, we limit our discussion on antennas for off-body radio links, also excluding antennas integrated into mobile terminals/cases and operating close to the body. Specifically, only wearable antennas that can be used separately from the radio unit are of interest here.VHF/UHF wearable antennas are mostly used in professional mobile radio communications for soldiers, emergency operators and law-enforcement personnel. VHF As far as VHF/UHF wearable antennas are concerned, many of their distinctive features are related to the fact that the corresponding free-space wavelength (with 30cm<<10m when 30MHz

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“…This research not only has an important scientific significance, but also has an practical value in the field of radar absorbing material, communication window, fabric antenna, flexible functional clothing and so on [11,12]. At present, domestic and foreign researchers have studied 2D FSF by screen printing [13,14], weaving [15], weft knitting [16,17], embroidery [18,19], selective chemical plating [20], ink-jet printing [21] or other textile processing.…”

Section: Introductionmentioning

confidence: 99%

Study of the Unit Structure in Frequency Selective Fabric Fabricated by U-Shaped Velvet

Wang¹,

Xiao²,

Cheng³

et al. 2017

JTEFT

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In this study, the three-dimension (3D) frequency selective fabrics (FSFs) fabricated by U-shaped velvet, using copper wires or silver filaments as the conductive unit material, were prepared. Specimens with different unit structure parameters were experimented and analyzed. Compared to FSFs with dipole unit structure, the velvet fabrics with the same unit length have two resonance peaks in the test frequency range. With an increase of inclination angle of velvet, the resonance frequency is changed slightly, accompanied by a trend of decreasing first and then stabilizing. And the resonance frequency of the FSF would shift slowly to higher frequency under the condition of increasing the linear density of conductive ply yarns. If the total length of U-shaped unit on the bottom is greater, the resonance frequency will go to the lower one. If the total length of U-shaped unit is same, specimens with the different number of unit will have the similar resonance frequencies. This work shows that the unit structure of U-shaped velvet FSFs can be designed with more parameters comparing with planar FSF.

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Inkjet-Printed Microstrip Patch Antennas Realized on Textile for Wearable Applications

Cited by 154 publications

References 16 publications

Printed frequency selective surfaces on textiles

Printed frequency selective surfaces on textiles

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

Study of the Unit Structure in Frequency Selective Fabric Fabricated by U-Shaped Velvet

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