| Project/Area Number |
11650357
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電子デバイス・機器工学
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| Research Institution | KANAZAWA INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
MIZUSAWA Motoo Kanazawa Institute of Technology, Division of Electrical Engineering, Professor, 工学部, 教授 (20199996)
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| Co-Investigator(Kenkyū-buntansha) |
OKUMURA Yoshihisa Kanazawa Institute of Technology, Division of Electrical Engineering, Professor, 工学部, 教授 (30139745)
NOGUCHI Keisuke Kanazawa Institute of Technology, Division of Electrical Engineering, Assistant Professor, 工学部, 講師 (10278103)
BETSUDAN Shin-ichi Kanazawa Institute of Technology, Division of Electrical Engineering, Professor, 工学部, 教授 (10298317)
山口 尚 金沢工業大学, 工学部, 教授 (80064476)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | mobile communication / mobile telephone / excitation element / antenna / body |
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| Research Abstract |
Mobile terminals such as mobile telephone are treated and radiation characteristics of antennas mounted on a body are analyzed. Radiation patterns and impedance characteristics of monopole, meander-line and patch antennas mounted on a body are calculated. In the calculation, contribution of the body is considered and current distributions on the body are illustrated. The relation between the current distributions and the radiation characteristics are made clear. Moreover, as mobile terminal antenna, small plate antennas are analyzed to increase the bandwidth on the impedance characteristics. In the analysis of the monopole antenna mounted on the body, distributions of the current flowing on the body are calculated by using the method of moments, and effects of the current to the radiation characteristics are discussed. Issues on the radiation affected by the effect are shown and improved by using parasitic elements that are mounted on the body. Consequently, using the elements can impr
… More
ove the radiation characteristics as follows : (a) control of the current distributions on the body, (b) suppression of the useless radiation toward the direction that is no base station, (c) increase of the radiation gain to 4.5dB toward base station. In the analysis of the meander-line antenna mounted on the body, impedance characteristics are investigated. Increasing the bandwidth of the antenna is carried out, which mounted a side of the body in parallel to a surface of the antenna. Patch antenna mounted on a substrate that is as the body of a mobile terminal is analyzed by use of the finite element method. The antenna can switch from horizontal polarization and vertical one because the antenna has two feed points set on sides of the patch. The antenna is useful for polarization diversity. Small plate antenna is also analyzed by use of the finite element method and increasing the bandwidth is discussed. Impedance characteristics is calculated and considered to obtain wideband characteristics. As results, bandwidth of 14.9% for VSWR≦ 3 was obtained. Less
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