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Paper Abstract and Keywords
Presentation 2010-01-21 16:10
Total radiated power (TRP) measurement system for small radio terminals using a spheroidal coupler combined with a variable matching circuit
Takashi Kawamura, Aya Yamamoto, Toru Sakuma, Yukiyasu Kimura, Yasuhiko Nago, Tasuku Teshirogi (Anritsu) AP2009-168
Abstract (in Japanese) (See Japanese page) 
(in English) Recently “antenna integrated radios” have been increasing rapidly which do not have terminals for monitoring Tx output power due to constraints on size and cost and requirements for multiple frequency use and multiple antennas. These radio terminals must be tested using radiation measurements where performance is expressed as total radiated power (TRP) and equivalent isotropically radiated power (e.i.r.p.). The existing standard method of measuring radiated power from equipment under test (EUT) is spherical scanning method in a radio anechoic chamber. This method , however, has serious problems such as a large-scale facility, long measurement time, and low sensitivity that makes it difficult to measure low-level spurious radiation.
In order to solve these difficulties, we previously proposed displacement method using a spheroidal coupler. This provides a compact facility, short measurement time, real time measurement, and very high sensitivity. In this report, we propose a new method measuring TRP using a variable matching circuit that improves the displacement method.
Keyword (in Japanese) (See Japanese page) 
(in English) total radiated power / TRP / small radio terminals / spheroidal coupler / displacement method / variable matching circuit / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 372, AP2009-168, pp. 75-80, Jan. 2010.
Paper # AP2009-168 
Date of Issue 2010-01-14 (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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee AP  
Conference Date 2010-01-21 - 2010-01-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamaguchi University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) AP 
Paper Information
Registration To AP 
Conference Code 2010-01-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Total radiated power (TRP) measurement system for small radio terminals using a spheroidal coupler combined with a variable matching circuit 
Sub Title (in English)  
Keyword(1) total radiated power  
Keyword(2) TRP  
Keyword(3) small radio terminals  
Keyword(4) spheroidal coupler  
Keyword(5) displacement method  
Keyword(6) variable matching circuit  
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Keyword(8)  
1st Author's Name Takashi Kawamura  
1st Author's Affiliation Anritsu Corporation (Anritsu)
2nd Author's Name Aya Yamamoto  
2nd Author's Affiliation Anritsu Corporation (Anritsu)
3rd Author's Name Toru Sakuma  
3rd Author's Affiliation Anritsu Corporation (Anritsu)
4th Author's Name Yukiyasu Kimura  
4th Author's Affiliation Anritsu Corporation (Anritsu)
5th Author's Name Yasuhiko Nago  
5th Author's Affiliation Anritsu Corporation (Anritsu)
6th Author's Name Tasuku Teshirogi  
6th Author's Affiliation Anritsu Corporation (Anritsu)
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Speaker
Date Time 2010-01-21 16:10:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2009-168 
Volume (vol) IEICE-109 
Number (no) no.372 
Page pp.75-80 
#Pages IEICE-6 
Date of Issue IEICE-AP-2010-01-14 


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