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Paper Abstract and Keywords
Presentation 2009-10-16 13:00
[Poster Presentation] Dependence of Ultra-Wideband Peak Power Measurements on Makes of Microwave Spectrum Analyzers
Akio Yokokawa (Tokyo Denki Univ.), Atsushi Tomiki (JAXA), Takehiko Kobayashi (Tokyo Denki Univ.) WBS2009-29
Abstract (in Japanese) (See Japanese page) 
(in English) Spectrum analyzers (SAs) are usually used to measure average and peak power spectra of ultra wideband (UWB) signals. Whereas the average power is measured in a 1-MHz resolution bandwidth (RBW), the UWB peak power is defined in a 50-MHz RBW. Most of the SAs, however, are not equipped with the 50-MHz RBW. Hence the power spectrum measured in a narrower RBW must be converted into the peak power spectrum in the 50-MHz RBW, but the conversion formula has not been well established. The RBW is defined with an impulse bandwidth (IBW) for peak power measurement in CISPR Publication 16-1-1, but most SAs do not strictly follow the CISPR definition. In this report, the IBWs of seven different SAs were measured by using an impulse signal. Then the three different UWB signals were measured in a 1-MHz RBW with the seven SAs, and the power spectra were converted into 50-MHz peak power spectra using conventional and new formulas. These UWB signals were also measured with a digital storage oscilloscope and then Fourier-transformed into 50-MHz-RBW spectra. The new formula using IBW instead of RBW yielded the consistent peak power spectra, which were found to be independent of SAs and to agree with the oscilloscope measurements.
Keyword (in Japanese) (See Japanese page) 
(in English) ultra wideband / peak power / spectrum analyzer / impulse bandwidth / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 233, WBS2009-29, pp. 25-30, Oct. 2009.
Paper # WBS2009-29 
Date of Issue 2009-10-09 (WBS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 WBS  
Conference Date 2009-10-16 - 2009-10-16 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To WBS 
Conference Code 2009-10-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Dependence of Ultra-Wideband Peak Power Measurements on Makes of Microwave Spectrum Analyzers 
Sub Title (in English)  
Keyword(1) ultra wideband  
Keyword(2) peak power  
Keyword(3) spectrum analyzer  
Keyword(4) impulse bandwidth  
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1st Author's Name Akio Yokokawa  
1st Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
2nd Author's Name Atsushi Tomiki  
2nd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
3rd Author's Name Takehiko Kobayashi  
3rd Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
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Speaker Author-1 
Date Time 2009-10-16 13:00:00 
Presentation Time 180 minutes 
Registration for WBS 
Paper # WBS2009-29 
Volume (vol) vol.109 
Number (no) no.233 
Page pp.25-30 
#Pages
Date of Issue 2009-10-09 (WBS) 


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