Ultra-wideband RF helmet antenna

Lebaric, J.; Tan, Ah-Tuan

doi:10.1109/milcom.2000.905081

Cited by 6 publications

(6 citation statements)

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“…Each antenna is hidden by the soldier's uniform, such that the radio operator is indistinguishable from any other soldier. The wideband helmet antenna in [155]- [156] is one of three antennas based on the antenna COMWIN concept. The helmet antenna consists of two radiating surfaces separated by a gap.…”

Section: B Multi-antenna Systems For Wideband Coveragementioning

confidence: 99%

“…Several papers have been devoted to the analysis and design of VHF/UHF antennas integrated on helmets ( [60]- [61], [79]- [80], [104], [145]- [148], [155]- [156]), as any soldier, policeman, firefighter, as well as motorcycle riders and bikers, wear such a head protection. The main advantages of a helmet antenna are related to its "prime location", represented by the body head.…”

Section: Introductionmentioning

confidence: 99%

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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.

108

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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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Section: B Multi-antenna Systems For Wideband Coveragementioning

confidence: 99%

Section: Introductionmentioning

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.

108

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“…Although wearable antennas suffer performance distortion when applied to human body, this field is still widely explored by researchers. One of the most researched wearable antenna types is the wearable fabric based antenna [13][14][15][16][17][18], initially designed in the form of a helmet [19] as well as a vest [20,21], and since then, it is always meant to be a part of clothing. In general, fabrics have low dielectric constant, hence this property helps in getting a wide bandwidth from the antenna.…”

Section: Introductionmentioning

confidence: 99%

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Kamardin¹,

Rahim²,

Samsuri³

et al. 2013

PIER B

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Abstract-Diamond dipole antennas with textile Artificial Magnetic Conductor (AMC) sheet-like waveguide were designed to investigate the possibility of improving transmission between antennas. Fleece fabric is used as the substrate of the textile AMC while SHIELDIT fabric is used as the conductive patches and ground plane. The AMC surface is designed to resonate at 2.45 GHz with the goal to enhance the transmission between antennas. A small textile AMC waveguide sheet as well as an AMC waveguide jacket were fabricated. The S-parameters performance of the two antennas with textile AMC sheet was investigated in a free space environment and near to human body setting. The effect of different antennas' orientations was also considered. Measurements were conducted thoroughly to validate the simulated findings. Compared to free space environment, S 21 transmission between two dipoles is improved up to maximum −10 dB when having textile AMC waveguide sheet beneath them. For both off-body and on-body placements, significant transmission enhancement has been observed with the introduction of the AMC sheet-like waveguide. Directive radiation patterns with high gain have also been achieved with the proposed AMC waveguide jacket.

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“…It is lightweight and inobtrusive. Lebaric and Tan (2000a) also has reported a similar conformal helmet antenna to the one reported in Lebaric and Tan (2000b). Fig.…”

Section: Conformal Helmet Antennasmentioning

confidence: 53%

“…The helmet antenna presented by Lebaric and Tan (2000b) is an ultra-wideband vertically polarized antenna consisting of two equal sized conducting strips on the camouflage cover of the combat helmet. They are connected by a thin copper strip.…”

Section: Conformal Helmet Antennasmentioning

confidence: 99%

Software Controlled Beam Steerable Antenna

Goonesinghe¹

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I am grateful to my PhD supervisor, Prof. Amit Mehta for all the support and guidance he has given me throughout my PhD. He has continuously funded my PhD since 2013, ensuring that I was free to concentrate on my research fully, without any financial worries. His immense support, guidance and encouragement were the reasons I managed to complete my research and thesis on time. I wish to thank my supervisor and friend, Dr. Arpan Pal, who has always been on hand to assist me during my research work in the lab. His support and assistance in completing my publications needs special mention. My parents have always been pillars of strength in my life. Their words of encouragement went a long way to ensure I remained focused during my studies overseas. My loving wife Charya, has always stood by me through thick and thin. Last year, she gifted me with a beautiful son whose innocent smile reminds me every day how lucky I am. I wish to thank Mr. Gareth Evans and Mr. David Moody from the College of Engineering for their assistance in fabricating my helmet antenna and providing other technical assistance during my research project. I also wish to thank my friend Dr. Gareth Ayres from LIS, for his assistance in the computer networking aspect of my research.

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Ultra-wideband RF helmet antenna

Cited by 6 publications

References 0 publications

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

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

Textile Artificial Magnetic Conductor Waveguide Jacket for on-Body Transmission Enhancement

Software Controlled Beam Steerable Antenna

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