Paper Abstract and Keywords |
Presentation |
2007-01-25 13:00
A Study on an Impedance Matching Method of Dipole Earphone Antennas with Varicap Diodes Attached to the Feedline for the Digital Terrestrial Broadcasting Reception Masato Tanaka, Ken-ichi Asanuma, Tadahiko Maeda (Ritsumeikan Univ.) AP2006-114 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
New digital broadcasting services for portable radio device started in Japan. To realize the high quality TV reception in the mobile environments, it is important to use diversity techniques, which usually requires multiple antennas. Due to the limited space of the handheld terminals, it is relatively difficult to place multiple antennas to a mobile terminal. Therefore, a tunable dipole external earphone antenna was proposed and investigated. The last paper proposed a simple feeding circuit structure to tune the operating frequency with a varicap diode inserted to the feed point. However, there is a problem in terms of the impedance matching when the antenna is used in vicinity of human body. Therefore, the focus of this paper is a modified impedance matching circuit with a varicap diode attached to the other end of the feed line and assessing the impedance characteristics of the earphone antenna including the effects of human body. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
earphone antenna / digital terrestrial broadcasting / human body / impedance matching / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 106, no. 491, AP2006-114, pp. 25-30, Jan. 2007. |
Paper # |
AP2006-114 |
Date of Issue |
2007-01-18 (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) |
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AP2006-114 |
Conference Information |
Committee |
AP |
Conference Date |
2007-01-25 - 2007-01-26 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Fukui Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Antennas and Propagation |
Paper Information |
Registration To |
AP |
Conference Code |
2007-01-AP |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A Study on an Impedance Matching Method of Dipole Earphone Antennas with Varicap Diodes Attached to the Feedline for the Digital Terrestrial Broadcasting Reception |
Sub Title (in English) |
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earphone antenna |
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digital terrestrial broadcasting |
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human body |
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impedance matching |
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1st Author's Name |
Masato Tanaka |
1st Author's Affiliation |
Ritsumeikan University (Ritsumeikan Univ.) |
2nd Author's Name |
Ken-ichi Asanuma |
2nd Author's Affiliation |
Ritsumeikan University (Ritsumeikan Univ.) |
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Tadahiko Maeda |
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Ritsumeikan University (Ritsumeikan Univ.) |
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Speaker |
Author-1 |
Date Time |
2007-01-25 13:00:00 |
Presentation Time |
25 minutes |
Registration for |
AP |
Paper # |
AP2006-114 |
Volume (vol) |
vol.106 |
Number (no) |
no.491 |
Page |
pp.25-30 |
#Pages |
6 |
Date of Issue |
2007-01-18 (AP) |
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