A Balance-Fed Loop Antenna System for Handset (Special Section on Multi-dimensional Mobile Information Networks)
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概要
- 論文の詳細を見る
In the conventional antenna system for the handset, some gain degradation has been observed when an operator holds the handset. This is caused by the variation of the current on the conducting box used in the handset due to the body effect. This paper presents (1) design concept of antenna for the handset and (2) analysis of a newly proposed loop antenna system, which has the balance structure for the antenna feed to reduce the effect of currents on the conducting box. In order to confirm the effectiveness of using the balance-fed loop antenna, a simple model using a small loop antenna mounted on a ground plane is analyzed. The current distribution for the balance-fed loop antenna system is obtained calculatedly and also experimentally and is compared with that for the unbalance-fed loop antenna system. In a result, remarkable decrease in the current distributiop on the ground plane for the case of the balance-fed antennas system is shown. Calculated results are in good agreement with measured results.
- 社団法人電子情報通信学会の論文
- 1999-07-25
著者
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Fujimoto K
Department Of Manufacturing Science Graduate School Of Engineering Osaka University
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Fujimoto K
Fais University Of Tsububa
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MORISHITA Hisashi
Dept. of Electrical and Electronic Engineering, National Defense Academy
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MORISHITA Hisashi
Faculty of Department of Electrical Engineering, National Defense Academy
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FURUUCHI Hiroki
Faculty of Department of Electrical Engineering, National Defense Academy
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IDE Harushige
Faculty of Department of Electrical Engineering, National Defense Academy
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TANAKA Zengo
Faculty of Department of Electrical Engineering, National Defense Academy
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FUJIMOTO Kyohei
Faculty of FAIS, University of Tsukuba
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Furuuchi Hiroki
Faculty Of Department Of Electrical Engineering National Defense Academy
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Morishita H
Department Of Electrical And Electronic Engineering National Defense Academy
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Tanaka Zengo
Faculty Of Department Of Electrical Engineering National Defense Academy
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Ide Harushige
Faculty Of Department Of Electrical Engineering National Defense Academy
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Morishita Hisashi
Dept. Of Electrical And Electronic Engineering National Defense Acad.
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