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Paper Abstract and Keywords
Presentation 2012-06-29 11:00
Maximum Available Q Factor (MAQ) Theory for Transmission-Line Feedback FET Oscillators
Tuya Wuren, Takanari Minami, Sonshu Sakihara, Naoki Sakai, Takashi Ohira (TUT) MW2012-18
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents maximum available Q factor (MAQ) for an FET oscillator employing a simple half wave length transmission-line as its feedback network. We analytically describe the derivation of oscillation condition and the stability criterion for the oscillator, and deduce the MAQ formula in terms of voltage gain . Transmission line loss is taken into account as well as , and in all analyses. The resultant formula and data show that the oscillation is unconditionally stable once the oscillation condition is satisfied. The oscillator shows higher Q factor for smaller . On the other hand decreases with for constant . Therefore too small leads oscillation to cease. Resultant data clarify the transmission line and FET parameters dependence of the MAQ.
Keyword (in Japanese) (See Japanese page) 
(in English) FET Oscillator / Q factor / transmission line / voltage gain / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 109, MW2012-18, pp. 1-4, June 2012.
Paper # MW2012-18 
Date of Issue 2012-06-22 (MW) 
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 MW2012-18

Conference Information
Committee MW  
Conference Date 2012-06-29 - 2012-06-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Gifu Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Signal Generation and Measurement / Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2012-06-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Maximum Available Q Factor (MAQ) Theory for Transmission-Line Feedback FET Oscillators 
Sub Title (in English)  
Keyword(1) FET Oscillator  
Keyword(2) Q factor  
Keyword(3) transmission line  
Keyword(4) voltage gain  
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1st Author's Name Tuya Wuren  
1st Author's Affiliation Toyohashi University of Technology (TUT)
2nd Author's Name Takanari Minami  
2nd Author's Affiliation Toyohashi University of Technology (TUT)
3rd Author's Name Sonshu Sakihara  
3rd Author's Affiliation Toyohashi University of Technology (TUT)
4th Author's Name Naoki Sakai  
4th Author's Affiliation Toyohashi University of Technology (TUT)
5th Author's Name Takashi Ohira  
5th Author's Affiliation Toyohashi University of Technology (TUT)
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Speaker Author-1 
Date Time 2012-06-29 11:00:00 
Presentation Time 30 minutes 
Registration for MW 
Paper # MW2012-18 
Volume (vol) vol.112 
Number (no) no.109 
Page pp.1-4 
#Pages 4 
Date of Issue 2012-06-22 (MW) 

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