Wave Absorber by Using Cylindrical Bars with Magnetic Loss Covers Arranged Metallic Mesh for Improving ETC Environment

Kouta MATSUMOTO; Atsushi KITAMOTO; Takuya NAKAMURA; Takahiro AOYAGI; Osamu HASHIMOTO; Takashi MIYAMOTO

doi:10.1093/ietele/e91-c.2.220

Regular Section

Wave Absorber by Using Cylindrical Bars with Magnetic Loss Covers Arranged Metallic Mesh for Improving ETC Environment

Kouta MATSUMOTO, Atsushi KITAMOTO, Takuya NAKAMURA, Takahiro AOYAGI, Osamu HASHIMOTO, Takashi MIYAMOTO

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Keywords: wave absorber, cylindrical bars, metallic mesh, ETC lane

JOURNAL RESTRICTED ACCESS

2008 Volume E91.C Issue 2 Pages 220-223

DOI https://doi.org/10.1093/ietele/e91-c.2.220

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Abstract

The wave absorber composed of cylindrical bars arranged periodically and metallic mesh for improving visibility is proposed for ETC, and characteristics of reflectivity and shielding effect are evaluated analytically and experimentally. As a result, reflectivity of -10dB and shielding effect of -25dB are obtained for circularly polarized wave when the gap between cylindrical bars is 30mm. Therefore, realization of proposed wave absorber for installing between ETC lanes can be clarified.

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