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Paper Abstract and Keywords
Presentation 2020-01-23 14:10
Design of a Frequency-Tunable Balun Using Wideband Planar Magic-T
Takuya Kitamura, Takayuki Tanaka, Ichihiko Toyoda (Saga Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) We have reported a magic-T based planar balun and its application to a variable phase shift balun and variable attenuation balun. In this study, a frequency tunable balun using a new wideband planar magic-T is proposed. The wideband planar Magic-T is designed by replacing a shorted quarter-wavelength slot line to a circular disc open end to reduce the frequency dependence. By connecting an additional microstrip line and a variable capacitor to the wideband magic-T, a frequency tunable balun which changes the passband of the balanced-unbalanced transformation is realized. Prototypes of the wideband planar magic-T and frequency tunable balun are designed to confirm the proposed concept. Better than 1-dB insertion loss and 10-dB return loss were obtained from 5 to 9 GHz.
Keyword (in Japanese) (See Japanese page) 
(in English) Balun / Magic-T / Frequency Tunable / Wideband / / / /  
Reference Info. ITE Tech. Rep., vol. 44, no. 2, BCT2020-4, pp. 13-16, Jan. 2020.
Paper # BCT2020-4 
Date of Issue 2020-01-16 (BCT) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2020-01-23 - 2020-01-24 
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Paper Information
Registration To BCT 
Conference Code 2020-01-BCT-KYUSHU-BT-AP-S-FUKUOKA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design of a Frequency-Tunable Balun Using Wideband Planar Magic-T 
Sub Title (in English)  
Keyword(1) Balun  
Keyword(2) Magic-T  
Keyword(3) Frequency Tunable  
Keyword(4) Wideband  
1st Author's Name Takuya Kitamura  
1st Author's Affiliation Saga University (Saga Univ.)
2nd Author's Name Takayuki Tanaka  
2nd Author's Affiliation Saga University (Saga Univ.)
3rd Author's Name Ichihiko Toyoda  
3rd Author's Affiliation Saga University (Saga Univ.)
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Speaker Author-1 
Date Time 2020-01-23 14:10:00 
Presentation Time 20 minutes 
Registration for BCT 
Paper # BCT2020-4 
Volume (vol) vol.44 
Number (no) no.2 
Page pp.13-16 
Date of Issue 2020-01-16 (BCT) 

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