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Paper Abstract and Keywords
Presentation 2007-05-18 10:50
Evaluation of the Near-Field UWB Transmission Characteristics Using the MR-FDTD Method Applied to the Parallel Computing
Ken-ichi Asanuma, Katsuhiro Fujimoto, Yuichi Yokota, Tadahiko Maeda (Ritsumeikan Univ.) AP2007-22
Abstract (in Japanese) (See Japanese page) 
(in English) To assess the actual performance of UWB transmission systems, various relative angles between the transmitting antenna and the receiving antenna must been evaluated, considering the actual relative positions of mobile terminals. In the case of far-field conditions, the transmission model can be described using the angular characteristics of the antenna transfer functions. In contrast, in the case of near-field conditions, 3D-conformal FDTD technique or high-resolution staircase approximation can be generally used to obtain accurate results for the skewed models where the transmitting and receiving antennas are not placed in parallel. However, these two solutions take significant calculation time because the analytical models should be prepared as a parameter of the angle between both antennas. Therefore, the MRFDTD (Multi-Region FDTD) method, which incorporates the separated multi-analytical region using near-field to near-field transformation (NFNFTF) as one of the more convenient solutions, was reported in the past. While several studies and results with NFNFTF based on the time-domain implementation have been reported, time-domain NFNFTF in practice has some problems. For example, the waveform interpolation and the random memory access caused by the time-shift from the source point to the observation point is not appropriate for parallel computing. In this paper, the MR-FDTD method using frequency-domain NFNFTF will be discussed.
Keyword (in Japanese) (See Japanese page) 
(in English) UWB / NF-NF transfromation / MR-FDTD / Paralell Computing / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 35, AP2007-22, pp. 51-56, May 2007.
Paper # AP2007-22 
Date of Issue 2007-05-10 (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 AP2007-22

Conference Information
Committee AP  
Conference Date 2007-05-17 - 2007-05-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi Univ. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) etc. 
Paper Information
Registration To AP 
Conference Code 2007-05-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of the Near-Field UWB Transmission Characteristics Using the MR-FDTD Method Applied to the Parallel Computing 
Sub Title (in English)  
Keyword(1) UWB  
Keyword(2) NF-NF transfromation  
Keyword(3) MR-FDTD  
Keyword(4) Paralell Computing  
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1st Author's Name Ken-ichi Asanuma  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Katsuhiro Fujimoto  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Yuichi Yokota  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
4th Author's Name Tadahiko Maeda  
4th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2007-05-18 10:50:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2007-22 
Volume (vol) vol.107 
Number (no) no.35 
Page pp.51-56 
#Pages 6 
Date of Issue 2007-05-10 (AP) 

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