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| Presentation | 2007-06-21 13:25 The near field diestribution affcting antenna input characteristics Hiroyuki Arai (Yokohama Natl. Univ.)  AP2007-38 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This report presents a physical explanation for the equivalent radius surrounding the antenna element. To define an antenna electrical volume for its stable resonance, we discuss the variation of antenna input impedance in the presence of a conducting wire simulating an electrical disturbance. A criterion of the impedance variation is defined by changing the length and location of conducting wire using a half wavelength dipole antenna in the first part of this report. We also presents that the length and location of conducting wire are seriously affected by the antenna geometry as examples of F and H shaped antennas. By the discussion about the antenna impedance variation in the presence of conducting wire, we propose a definition of electrical volume and examine it for several examples. We also verify the concept of the equivalent sphere radius defined by the diameter surrounding antenna which is multiplied by the absolute value of the maximum current strength of the antenna element. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Small antenna / Electrical volume / Unloaded Q / Miniaturizing factor / Equivalent sphere / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 97, AP2007-38, pp. 41-46, June 2007. | |
| Paper # | AP2007-38 | |
| Date of Issue | 2007-06-14 (AP) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | AP2007-38 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2007-06-21 - 2007-06-21 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2007-06-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | The near field diestribution affcting antenna input characteristics |
| Sub Title (in English) | |
| Keyword(1) | Small antenna |
| Keyword(2) | Electrical volume |
| Keyword(3) | Unloaded Q |
| Keyword(4) | Miniaturizing factor |
| Keyword(5) | Equivalent sphere |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hiroyuki Arai |
| 1st Author's Affiliation | Yokohama National University (Yokohama Natl. Univ.) |
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| Speaker | Author-1 |
| Date Time | 2007-06-21 13:25:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2007-38 |
| Volume (vol) | vol.107 |
| Number (no) | no.97 |
| Page | pp.41-46 |
| #Pages | 6 |
| Date of Issue | 2007-06-14 (AP) |
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