Characteristics of Built-In Folded Monopole Antenna for Handsets(<Special Section>2004 International Symposium on Antennas and Propagation)
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概要
- 論文の詳細を見る
A folded loop antenna for handsets has already been introduced and shown as one of balance-fed antennas for handsets, which is very effective to mitigate the antenna performance degradation due to the body effect. In order to meet the requirements for the latest handsets such as low profile and small size, a folded loop antenna is modified. The antenna, which is possibly built in the handsets, is newly proposed. Low profile and small size is achieved by consisting of the half of low profile folded loop antenna, which has a structure folded loop elements sideways so that the antenna can be placed on the ground plane (GP). In the analysis, the electromagnetic simulator based on the FDTD (Finite Difference Time Domain) method is used and the design parameters useful in practical operation are found. The electromagnetic simulator based on the Method of Moment (MoM) is used to calculate the current distribution on the antenna element and the GP. An example of low profile and small size antenna which has wideband characteristics are designed based on these parameters, and the antenna characteristics such as VSWR, the current distributions and the radiation patterns are compared with Planar Inverted-F Antenna (PIFA), which is one of conventional built-in antennas for handset. As a result, it has been confirmed that the physical volume of the antenna, which has been introduced here, becomes smaller than that of PIFA. In addition, the radiation efficiency of these antennas is measured and the results are compared with each other.
- 社団法人電子情報通信学会の論文
- 2005-06-01
著者
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Kim Yunjin
Jet Propulsion Laboratory California Institute Of Technology
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Tanaka T
Semiconductor Device Research Center Semiconductor Company Matsushita Electric Industrial Co. Ltd.
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HAYASHIDA Shogo
National Defense Academy of Japan
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TANAKA Tomoki
National Defense Academy of Japan
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MORISHITA Hisashi
National Defense Academy of Japan
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KOYANAGI Yoshio
Panasonic Mobile Communications CO., LTD.
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FUJIMOTO Kyohei
FAIS, University of Tsububa
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Tanaka Tomoki
Japan Air Lines
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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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Koyanagi Yoshio
Department Of Virology Tohoku University School Of Medicine
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Koyanagi Yoshio
Panasonic Mobile Communications Co. Ltd.
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MORISHITA Hisashi
Dept. of Electrical and Electronic Engineering, National Defense Academy
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Morishita H
Department Of Electrical And Electronic Engineering National Defense Academy
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Koyanagi Y
Panasonic Mobile Communications Co. Ltd.
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Morishita Hisashi
Dept. Of Electrical And Electronic Engineering National Defense Acad.
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