Helmet-Mounted Inverted-F Antenna at VHF Band

Naobumi Michishita; Yusuke Saita; Hisashi Morishita; Michitaka Ameya; Masanobu Hirose; Satoru Kurokawa

doi:10.15748/jasse.7.291

Papers

Helmet-Mounted Inverted-F Antenna at VHF Band

Naobumi Michishita, Yusuke Saita, Hisashi Morishita, Michitaka Ameya, Masanobu Hirose, Satoru Kurokawa

著者情報

キーワード: Inverted-F antenna, Helmet antenna, Wearable antenna, Very high frequency band, Ohmic loss, Specific absorption rate

ジャーナルフリー

2020 年 7 巻 2 号 p. 291-299

DOI https://doi.org/10.15748/jasse.7.291

詳細

抄録

A helmet for disaster prevention must be worn to prevent secondary disasters in rescue and evacuation activities when a disaster occurs. Helmet antennas have been widely developed as wearable antennas. In this paper, we investigated the effect of ohmic loss due to the material of the hemispherical conductor. In addition, the validity of the simulation results was verified through experiment. The loading position of the antenna element was examined to further improve the gain. As a result, the maximum gain of −2.6 dBi and the local specific absorption rate value of 0.07 W/kg was achieved at 150 MHz.

責任著者(Corresponding author)

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