Derivation Of Some Expansions Of Near-Field Gain Of Antennas In Lossy Medium

Nozomu Ishii,Lira Hamada,Jerdvisanop Chakarothai,Kanako Wake,Soichi Watanabe

2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC)（2016）

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Abstract

To estimate SAR (specific absorption rate) of the wireless devices operated in HF band, the behavior of the near-field gain in the near-field region of the reference antennas operated in the tissue-equivalent liquid is required. Some asymptotic expansions of the near-field gain of the reference antennas are derived by using an integral form of the transmission coefficient between the antennas and expansion theorem.

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Key words

near-field gain,lossy homogeneous medium,Friis transmission formula,expansion theorem

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