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Paper Abstract and Keywords
Presentation 2011-06-24 10:30
Low Loss and Broadband Isolation Lumped Element Isolator Using Gyrator Circuit.
Takaya Wada, Takashi Hasegawa, Yoshinori Taguchi, Reiji Nakajima (Murata Mfg. Co., Ltd) MW2011-38 Link to ES Tech. Rep. Archives: MW2011-38
Abstract (in Japanese) (See Japanese page) 
(in English) A novel broadband Core-Isolator for modules of multi-standard and multi-band mobile handsets has been developed successfully. A new circuit configuration for extending the isolation frequency band is proposed. The equations of the insertion loss and the isolation bandwidth of a two-port isolator with resonant elements are derived from equivalent circuit using perturbation theory. They show that the isolation bandwidth gets wider depending on the ratio of inductor and capacitor of resonant elements without increasing the insertion loss.
A 1.5 x 0.9 x 0.4 mm3 Core-Isolator with two electrodes of asymmetrical structure has been fabricated, which is mounted on a module substrate with resonant elements. It has an insertion loss of 0.5dB and an isolation of 10dB at 824-915MHz which is twice wider than conventional one.
Keyword (in Japanese) (See Japanese page) 
(in English) Admittance matrix / Scattering parameters / Isolators / Gyrators / Inductors / Lumped element microwave circuits / Resonant elements /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 95, MW2011-38, pp. 35-39, June 2011.
Paper # MW2011-38 
Date of Issue 2011-06-16 (MW) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 MW2011-38 Link to ES Tech. Rep. Archives: MW2011-38

Conference Information
Committee MW  
Conference Date 2011-06-23 - 2011-06-24 
Place (in Japanese) (See Japanese page) 
Place (in English) National Institute for Fusion Science 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Signal Generation and Measurement / NA 
Paper Information
Registration To MW 
Conference Code 2011-06-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Low Loss and Broadband Isolation Lumped Element Isolator Using Gyrator Circuit. 
Sub Title (in English)  
Keyword(1) Admittance matrix  
Keyword(2) Scattering parameters  
Keyword(3) Isolators  
Keyword(4) Gyrators  
Keyword(5) Inductors  
Keyword(6) Lumped element microwave circuits  
Keyword(7) Resonant elements  
1st Author's Name Takaya Wada  
1st Author's Affiliation Murata Manufacturing Co., ltd (Murata Mfg. Co., Ltd)
2nd Author's Name Takashi Hasegawa  
2nd Author's Affiliation Murata Manufacturing Co., ltd (Murata Mfg. Co., Ltd)
3rd Author's Name Yoshinori Taguchi  
3rd Author's Affiliation Murata Manufacturing Co., ltd (Murata Mfg. Co., Ltd)
4th Author's Name Reiji Nakajima  
4th Author's Affiliation Murata Manufacturing Co., ltd (Murata Mfg. Co., Ltd)
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Speaker Author-1 
Date Time 2011-06-24 10:30:00 
Presentation Time 30 minutes 
Registration for MW 
Paper # MW2011-38 
Volume (vol) vol.111 
Number (no) no.95 
Page pp.35-39 
Date of Issue 2011-06-16 (MW) 

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