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Paper Abstract and Keywords
Presentation 2019-10-24 16:25
[Special Talk] Conical monopole antennas with non-uniform transmission line type structure terminated in free space impedance
Shigeki Minegishi (TGU) EMCJ2019-52 MW2019-81 EST2019-60
Abstract (in Japanese) (See Japanese page) 
(in English) An antenna may be impedance transformer and mode transformer. Conical monopole antennas with non-uniform transmission line type structure terminated in free space impedance were proposed. The proposed antennas are based on a single cone antenna and have various non-uniform transmission line type structures which are Linear, Exponential, Hill, and Double Boltzmann function type tapered lines as a broadband radiation device. The characteristic impedance of the antennas changes from 50 Ω of the feed point to the free space impedance according to various functions. As a result of experiment of Hill tapered antenna of length L=0.3m, the return loss was less then -20dB in frequency range from 1.4 GHz to 9 GHz.
Keywords Taper antenna,Exponential function,Hill function,Double-Boltzmann function, VSWR
Keyword (in Japanese) (See Japanese page) 
(in English) Taper antenna / Exponential function / Hill function / Double Boltzman function / VSWR / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 241, EMCJ2019-52, pp. 89-89, Oct. 2019.
Paper # EMCJ2019-52 
Date of Issue 2019-10-17 (EMCJ, MW, EST) 
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 EMCJ2019-52 MW2019-81 EST2019-60

Conference Information
Conference Date 2019-10-24 - 2019-10-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Gakuin University(Conf. Room 2, Eng. Bldg. 1) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC, Microwave, Electromagnetic field simulation. 
Paper Information
Registration To EMCJ 
Conference Code 2019-10-EMCJ-MW-EST-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Conical monopole antennas with non-uniform transmission line type structure terminated in free space impedance 
Sub Title (in English)  
Keyword(1) Taper antenna  
Keyword(2) Exponential function  
Keyword(3) Hill function  
Keyword(4) Double Boltzman function  
Keyword(5) VSWR  
1st Author's Name Shigeki Minegishi  
1st Author's Affiliation Tohoku Gakuin University (TGU)
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Date Time 2019-10-24 16:25:00 
Presentation Time 40 
Registration for EMCJ 
Paper # IEICE-EMCJ2019-52,IEICE-MW2019-81,IEICE-EST2019-60 
Volume (vol) IEICE-119 
Number (no) no.241(EMCJ), no.242(MW), no.243(EST) 
Page p.89 
#Pages IEICE-1 
Date of Issue IEICE-EMCJ-2019-10-17,IEICE-MW-2019-10-17,IEICE-EST-2019-10-17 

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