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Paper Abstract and Keywords
Presentation 2012-06-22 13:35
Theoretical Study of the Calibration Distance for Parabolic Antennas used in EMI Measurements
Katsumi Fujii, Makoto Sakasai, Akira Sugiura (NICT) EMCJ2012-26
Abstract (in Japanese) (See Japanese page) 
(in English) A parabolic antenna incorporating a broadband feed antenna is often used for low-level and broadband EMI measurements such as spurious measurements of radars. Accordingly, calibration of parabolic measuring antennas is requested to determine their gain. In this connection, the present paper theoretically investigates the separation distance between transmit and receive antennas required for accurate calibration of parabolic antennas. Numerical simulation is carried out using the physical optics approximation method (PO). It evidently shows that, if the feed antenna is set at the focal point of the reflector, calibration with an antenna separation greater than R=2D^2/λ can yield the antenna gain with an error less than 0.1 dB. However, if the feed antenna is away from the focal point, calibration error remarkably increases and a larger antenna separation is required. Furthermore, a commercially-available parabolic antenna using a log periodic dipole array (LPDA) as a feed is numerically studied to determine the separation distance required for the frequency range from 3 GHz to 18 GHz.
Keyword (in Japanese) (See Japanese page) 
(in English) Parbolic antenna / Antenna gain / Calibration / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 100, EMCJ2012-26, pp. 35-40, June 2012.
Paper # EMCJ2012-26 
Date of Issue 2012-06-15 (EMCJ) 
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)
Download PDF EMCJ2012-26

Conference Information
Committee EMCJ IEE-EMC  
Conference Date 2012-06-22 - 2012-06-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC 
Paper Information
Registration To EMCJ 
Conference Code 2012-06-EMCJ-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Theoretical Study of the Calibration Distance for Parabolic Antennas used in EMI Measurements 
Sub Title (in English)  
Keyword(1) Parbolic antenna  
Keyword(2) Antenna gain  
Keyword(3) Calibration  
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1st Author's Name Katsumi Fujii  
1st Author's Affiliation NICT (NICT)
2nd Author's Name Makoto Sakasai  
2nd Author's Affiliation NICT (NICT)
3rd Author's Name Akira Sugiura  
3rd Author's Affiliation NICT (NICT)
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Speaker Author-1 
Date Time 2012-06-22 13:35:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2012-26 
Volume (vol) vol.112 
Number (no) no.100 
Page pp.35-40 
#Pages 6 
Date of Issue 2012-06-15 (EMCJ) 

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