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Paper Abstract and Keywords
Presentation
X-Band Broadband Branch-Line Coupler with Loose Coupling Utilizing Short-/Open-Circuited Coupled-Transmission Lines
Yuya Haoka, Tadashi Kawai, Akira Enokihara (Univ. of Hyogo)
Abstract (in Japanese) (See Japanese page) 
(in English) In this research, we describe broadband branch-line couplers with very loose coupling at X-band. The proposed branch-line couplers consist of short-/open-circuited coupled-transmission lines as a pair of branch-lines and external matching networks. As a result of designing broadband couplers with a coupling factor of -20 dB based on the equivalent admittance approach, the desired coupling factor is obtained. In addition, the coupler had broadband characteristics with a relative bandwidth of about 43.1% by electromagnetic simulation. Then, fabrication and experiment of the proposed circuit were carried out, and the effectiveness of this design method was confirmed experimentally.
Keyword (in Japanese) (See Japanese page) 
(in English) Coupled-transmission line / matching circuit / broadband / equivalent admittance / X-band / / /  
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Conference Information
Committee MW  
Conference Date 2018-06-27 - 2018-06-29 
Place (in Japanese) (See Japanese page) 
Place (in English) KMITL, Bangkok, Thailand 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 2018 Thailand-Japan MicroWave (TJMW2018) 
Paper Information
Registration To MW 
Conference Code 2018-06-MW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) X-Band Broadband Branch-Line Coupler with Loose Coupling Utilizing Short-/Open-Circuited Coupled-Transmission Lines 
Sub Title (in English)  
Keyword(1) Coupled-transmission line  
Keyword(2) matching circuit  
Keyword(3) broadband  
Keyword(4) equivalent admittance  
Keyword(5) X-band  
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1st Author's Name Yuya Haoka  
1st Author's Affiliation University of Hyogo (Univ. of Hyogo)
2nd Author's Name Tadashi Kawai  
2nd Author's Affiliation University of Hyogo (Univ. of Hyogo)
3rd Author's Name Akira Enokihara  
3rd Author's Affiliation University of Hyogo (Univ. of Hyogo)
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