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Paper Abstract and Keywords
Presentation 2008-09-11 13:25
Wideband Design Method for Self-Adaptive Power Divider Configuration for Reducing the Effects of Human Hand Placed in the Vicinity of Antennas
Hiroshi Tanji, Wataru Nakamura, Tadahiko Maeda (Ritsumeikan Univ.) AP2008-82
Abstract (in Japanese) (See Japanese page) 
(in English) Human hand affects radio-frequency devices such as built-in antennas when these devices are used by the human operator. To improve the total radiation efficiency of the antenna system covered by human hand, self-adaptive power divider configuration composed of two radiating elements combined with CSRR filters was proposed and basic characteristics of the self-adaptive power divider were evaluated with experiments as well as with the FDTD simulations. While this proposed configuration enables to increase the radiation efficiency of the total antenna system by 26 ％, the available relative bandwidth is less than 5 ％. This paper describes an alternative new configuration for the self-adaptive power divider in order to expand the available relative bandwidth of the self-adaptive power divider. When one of the two radiating element is covered by a human equivalent phantom, the proposed configuration shows effective adaptive power shift from the covered radiating element to the uncovered radiating element. Also, it has been confirmed that the relative bandwidth of the fabricated antenna with the proposed new configuration exceeds 30 ％, which is 5 times wider than the relative bandwidth of the previous configuration.
Keyword (in Japanese) (See Japanese page) 
(in English) Complementary Split-Ring Resonator / Human Hand / Band-Pass Filter / Parallel Feeding / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 201, AP2008-82, pp. 43-48, Sept. 2008.
Paper # AP2008-82 
Date of Issue 2008-09-04 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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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Conference Information
Committee AP  
Conference Date 2008-09-11 - 2008-09-12 
Place (in Japanese) (See Japanese page) 
Place (in English) National Defense Academy 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Etc. 
Paper Information
Registration To AP 
Conference Code 2008-09-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Wideband Design Method for Self-Adaptive Power Divider Configuration for Reducing the Effects of Human Hand Placed in the Vicinity of Antennas 
Sub Title (in English)  
Keyword(1) Complementary Split-Ring Resonator  
Keyword(2) Human Hand  
Keyword(3) Band-Pass Filter  
Keyword(4) Parallel Feeding  
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1st Author's Name Hiroshi Tanji  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Wataru Nakamura  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Tadahiko Maeda  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2008-09-11 13:25:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2008-82 
Volume (vol) vol.108 
Number (no) no.201 
Page pp.43-48 
#Pages 6 
Date of Issue 2008-09-04 (AP) 

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