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Paper Abstract and Keywords
Presentation 2023-10-20 09:30
Influence of Substrate Permittivity for Bandwidth of Microstrip Antenna with Small Ground Plane
Hideki Ueda, Ryotaro Ohashi (Murata Mfg.) AP2023-120
Abstract (in Japanese) (See Japanese page) 
(in English) Microstrip antennas (MSAs) have wider bandwidths of the reflection when the permittivity of the substrate is lower generally assuming a ground conductor with infinite size. However, it is confirmed that the MSA has a wider bandwidth with a higher permittivity when the ground conductor is as small as the radiating element. The unloaded Q (QU) of MSA is derived by using the permittivity and the size of the ground as parameters. A lower QU is obtained with a higher permittivity when the ground conductor is as small as the radiating element. The widest bandwidth of the reflection is calculated by the approximate equation using QU. It is confirmed that the approximated widest bandwidth is proportional to the bandwidths maximized by a circuit model and an electromagnetic model with the variations of 17~20% and 10~14%. An advantage of the use of the higher permittivity is shown when the ground conductor is small by the actual electromagnetic model.
Keyword (in Japanese) (See Japanese page) 
(in English) Microstrip Antenna / Patch Antenna / Ground Plane / Bandwidth / Q-factor / Permittivity / Substrate /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 223, AP2023-120, pp. 117-122, Oct. 2023.
Paper # AP2023-120 
Date of Issue 2023-10-12 (AP) 
ISSN 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 AP2023-120

Conference Information
Committee AP  
Conference Date 2023-10-19 - 2023-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Iwate University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Student Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2023-10-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Influence of Substrate Permittivity for Bandwidth of Microstrip Antenna with Small Ground Plane 
Sub Title (in English)  
Keyword(1) Microstrip Antenna  
Keyword(2) Patch Antenna  
Keyword(3) Ground Plane  
Keyword(4) Bandwidth  
Keyword(5) Q-factor  
Keyword(6) Permittivity  
Keyword(7) Substrate  
Keyword(8)  
1st Author's Name Hideki Ueda  
1st Author's Affiliation Murata Manufacturing Co., Ltd. (Murata Mfg.)
2nd Author's Name Ryotaro Ohashi  
2nd Author's Affiliation Murata Manufacturing Co., Ltd. (Murata Mfg.)
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Speaker Author-1 
Date Time 2023-10-20 09:30:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2023-120 
Volume (vol) vol.123 
Number (no) no.223 
Page pp.117-122 
#Pages 6 
Date of Issue 2023-10-12 (AP) 

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