IEICE Technical Committee Submission System
Conference Paper's Information
Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2019-01-18 14:50
Design of Microstrip Tunable Filtering Antenna with Constant Absolute Bandwidth
Tomoyasu Soma, Masataka Ohira, Zhewang Ma (Saitama Univ.) ED2018-87 MW2018-154 Link to ES Tech. Rep. Archives: ED2018-87 MW2018-154
Abstract (in Japanese) (See Japanese page) 
(in English) A tunable antenna that can change its resonant frequency electronically is one of promising components for future wireless communications. Conventional tunable antennas have problems that the return loss characteristic is worse, and the frequency bandwidth is narrower as the resonant frequency is tuned with a varactor diode. To overcome these disadvantages, the co-design approach of tunable bandpass filter and antenna have been applied to a varactor-tuned antenna. However, a constant frequency bandwidth has not been realized yet with a tunable filtering antenna, since frequency characteristics of circuit parameters, such as coupling coefficients, external Q factor, and radiation Q factor, do not meet their requirements determined from a well-established filter theory. This paper proposes a new microstrip tunable filtering antenna having a constant frequency bandwidth, and also presents its design method. As an example, we design a third-order tunable filtering antenna under design specifications of a tuning center-frequency range 1.94-2.16 GHz and a constant frequency bandwidth 60 MHz. The effectiveness of the proposed tunable filtering antenna is verified through fabrication and measurement.
Keyword (in Japanese) (See Japanese page) 
(in English) tunable antenna / filtering antenna / varactor diode / absolute frequency bandwidth / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 403, MW2018-154, pp. 97-102, Jan. 2019.
Paper # MW2018-154 
Date of Issue 2019-01-10 (ED, 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 ED2018-87 MW2018-154 Link to ES Tech. Rep. Archives: ED2018-87 MW2018-154

Conference Information
Committee MW ED  
Conference Date 2019-01-17 - 2019-01-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Hitachi, Central Research Lab. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Compound semiconductor, High speed and High frequency devices/Microwave technologies 
Paper Information
Registration To MW 
Conference Code 2019-01-MW-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of Microstrip Tunable Filtering Antenna with Constant Absolute Bandwidth 
Sub Title (in English)  
Keyword(1) tunable antenna  
Keyword(2) filtering antenna  
Keyword(3) varactor diode  
Keyword(4) absolute frequency bandwidth  
1st Author's Name Tomoyasu Soma  
1st Author's Affiliation Saitama University (Saitama Univ.)
2nd Author's Name Masataka Ohira  
2nd Author's Affiliation Saitama University (Saitama Univ.)
3rd Author's Name Zhewang Ma  
3rd Author's Affiliation Saitama University (Saitama Univ.)
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
Speaker Author-1 
Date Time 2019-01-18 14:50:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # ED2018-87, MW2018-154 
Volume (vol) vol.118 
Number (no) no.402(ED), no.403(MW) 
Page pp.97-102 
Date of Issue 2019-01-10 (ED, MW) 

[Return to Top Page]

[Return to IEICE Web Page]

The Institute of Electronics, Information and Communication Engineers (IEICE), Japan