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Paper Abstract and Keywords
Presentation 2012-10-18 14:05
H-Plane Waveguide Multiple Power Divider/Combiner of Chain Structure
Hiroaki Ikeuchi, Isao Ohta, Kuniyuki Omonishi, Tadashi Kawai (Univ. of Hyogo), Mitsuyoshi Kishihara (Okayama Prefectural Univ.) MW2012-92
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a design methodology of an H-plane waveguide N-way power divider/combiner constructed by serially connecting N-1 directional couplers in order of coupling coefficient of $10\log_{10}N$[dB]. For realization of a compact structure capable of dividing equal powers in the same direction in the H-plane, compact H-plane directional couplers with similar configuration having each desired coupling coefficient are required. In this paper, we utilize H-plane waveguide cruciform couplers which are marked by very compact and simple structure. However, since they are not applicable to the present circuit system as they stand, it is required that a coupled power to an output port crossing at right angles to an input port is weaker than another ahead coupling port by devising the circuit configuration. First, we design a five-way power divider/combiner by using four successfully optimized directional couplers, and obtain a good performance that a bandwidth for a return loss better than 18 dB is about 9.0 %, and in the same operation band a power division unbalance stays within ±0.7 dB. However, since the bandwidth of the couplers reduces as the coupling becomes weaker, the performance of the power divider/combiner deteriorates with increasing the number of output port. Next, therefore, we try to widen the bandwidth of the directional couplers, and successfully realize a relatively wide bandwidth of about 13 dB coupling coefficient. Finally, we design a five- and a ten-way power dividers/combiners using the band-broadened directional couplers. As a result, bandwidths for input-port return loss and isolation among the output ports better than 20 dB are about 9.7％ and 10% for the five- and ten-way dividers, respectively, though the unbalance of power division becomes larger at the higher frequencies. If an unbalance of power division is allowed within ±1.0dB, we can obtain the bandwidth of about 8.6% and 7.1%, respectively.
Keyword (in Japanese) (See Japanese page) 
(in English) Power divider/combiner / Directional coupler / H-plane waveguide / Microwave / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 251, MW2012-92, pp. 65-70, Oct. 2012.
Paper # MW2012-92 
Date of Issue 2012-10-11 (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)
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Conference Information
Committee MW  
Conference Date 2012-10-18 - 2012-10-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Utsunomiya Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2012-10-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) H-Plane Waveguide Multiple Power Divider/Combiner of Chain Structure 
Sub Title (in English)  
Keyword(1) Power divider/combiner  
Keyword(2) Directional coupler  
Keyword(3) H-plane waveguide  
Keyword(4) Microwave  
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1st Author's Name Hiroaki Ikeuchi  
1st Author's Affiliation University of Hyogo (Univ. of Hyogo)
2nd Author's Name Isao Ohta  
2nd Author's Affiliation University of Hyogo (Univ. of Hyogo)
3rd Author's Name Kuniyuki Omonishi  
3rd Author's Affiliation University of Hyogo (Univ. of Hyogo)
4th Author's Name Tadashi Kawai  
4th Author's Affiliation University of Hyogo (Univ. of Hyogo)
5th Author's Name Mitsuyoshi Kishihara  
5th Author's Affiliation Okayama Prefectural University (Okayama Prefectural Univ.)
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Speaker Author-1 
Date Time 2012-10-18 14:05:00 
Presentation Time 20 minutes 
Registration for MW 
Paper # MW2012-92 
Volume (vol) vol.112 
Number (no) no.251 
Page pp.65-70 
#Pages 6 
Date of Issue 2012-10-11 (MW) 

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