Low-profile head-worn antenna with a monopole-like radiation pattern

Toni Björninen; Fan Yang

doi:10.1109/LAWP.2015.2475158

Low-profile head-worn antenna with a monopole-like radiation pattern

Toni Björninen, Fan Yang

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Abstract

We present a low-profile antenna derived from a center-fed circular patch to provide uniform spatial coverage around a human head in 5.8 GHz ISM band. With the thickness of only 7 mm, it provides a compelling solution for a beacon-like radiator or harvester embedded in a smart headgear or in an in/off body communication relay-station. Below, we will first outline the development of an ellipsoid head model for numerically efficient optimization of the antenna and then detail the antenna development based on full-wave simulations. The results are validated using an anatomical head model and measurements both in air and in head-worn configuration. The measured results show that the antenna achieves a 0-dBi gain in the spatial angles around the head. The simulated radiation efficiency is 76% and SAR is well below ICNIRP and FCC limits even with 100 mW antenna power.

Original language	English
Pages (from-to)	794-797
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	15
Early online date	31 Aug 2015
DOIs	https://doi.org/10.1109/LAWP.2015.2475158
Publication status	Published - 2015
Publication type	A1 Journal article-refereed

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10.1109/LAWP.2015.2475158

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http://urn.fi/URN:NBN:fi:tty-201603013590

Cite this

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title = "Low-profile head-worn antenna with a monopole-like radiation pattern",

abstract = "We present a low-profile antenna derived from a center-fed circular patch to provide uniform spatial coverage around a human head in 5.8 GHz ISM band. With the thickness of only 7 mm, it provides a compelling solution for a beacon-like radiator or harvester embedded in a smart headgear or in an in/off body communication relay-station. Below, we will first outline the development of an ellipsoid head model for numerically efficient optimization of the antenna and then detail the antenna development based on full-wave simulations. The results are validated using an anatomical head model and measurements both in air and in head-worn configuration. The measured results show that the antenna achieves a 0-dBi gain in the spatial angles around the head. The simulated radiation efficiency is 76% and SAR is well below ICNIRP and FCC limits even with 100 mW antenna power.",

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doi = "10.1109/LAWP.2015.2475158",

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AU - Yang, Fan

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AB - We present a low-profile antenna derived from a center-fed circular patch to provide uniform spatial coverage around a human head in 5.8 GHz ISM band. With the thickness of only 7 mm, it provides a compelling solution for a beacon-like radiator or harvester embedded in a smart headgear or in an in/off body communication relay-station. Below, we will first outline the development of an ellipsoid head model for numerically efficient optimization of the antenna and then detail the antenna development based on full-wave simulations. The results are validated using an anatomical head model and measurements both in air and in head-worn configuration. The measured results show that the antenna achieves a 0-dBi gain in the spatial angles around the head. The simulated radiation efficiency is 76% and SAR is well below ICNIRP and FCC limits even with 100 mW antenna power.

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JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

Low-profile head-worn antenna with a monopole-like radiation pattern

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