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Featured researches published by Motomi Abe.


international microwave symposium | 2008

A waveguide-based power divider using H-plane probes short-circuited with substrate metallization patterns

Motomi Abe; Yukihiro Tahara; Naofumi Yoneda; Hideyuki Oh-Hashi

A novel waveguide power divider based on a coaxial-to-waveguide transition using a H-plane probe is presented. The waveguide consists of split metal blocks and substrates which are alternately stacked. The power dividing is realized by arranging identical transitions using coaxial probes short-circuited with metal patterns on the substrate. The advantages of this structure are small footprint, low insertion loss, simple fabrication, and ease of design. A design method of the proposed power divider is described. The fabricated eight-way power divider shows excellent performances at X-band.


Archive | 2008

Ebg structure unit

Motomi Abe; Yoshihiko Konishi; Yukihiro Tawara; Hisafumi Yoneda; 素実 安部; 善彦 小西; 志浩 田原; 尚史 米田


european microwave conference | 2012

A broadband and compact branch-line coupler using series capacitances and short-circuited stubs

Motomi Abe; Takeshi Ohshima; Hideki Hatakeyama; Akihiro Itaba; Naofumi Yoneda; Tetsu Owada


IEICE Transactions on Electronics | 2018

Ka-Band Branch Line Coupler Applied Hexagonal Waveguide Suitable for Additive Manufacturing

Motomi Abe; Hidenori Yukawa; Yu Ushijima; Takuma Nishimura; Takeshi Oshima; Takeshi Yuasa; Naofumi Yoneda


european microwave conference | 2017

A 3-D metal-direct-printed, low-cost, and light hexagonal waveguide Ka-band branch line coupler

Motomi Abe; Hidenori Yukawa; Yu Ushijima; Takuma Nishimura; Naofumi Yoneda; Moriyasu Miyazaki


european microwave conference | 2017

A metal 3D-printed T-junction OMT with an offset stepped post

Hidenori Yukawa; Yu Ushijima; Motomi Abe; Naofumi Yoneda; Moriyasu Miyazaki


european microwave conference | 2016

Novel tight coupling and high directivity λ /4 partially-narrowed and slotted coupled line and its application

Motomi Abe; Yukihiro Tahara; Naofumi Yoneda; Hideji Takeda; Tetsu Owada


IEICE Transactions on Electronics | 2016

A Novel Directional Coupler Loaded with Feedback Capacitances and Its Applications

Motomi Abe; Yukihiro Tahara; Tetsu Owada; Naofumi Yoneda; Hiroaki Miyashita


Archive | 2011

High frequency filter and high frequency module

Motomi Abe; Saneto Kimura; Yukinori Tarui; Yukihiro Tawara; 幸宣 垂井; 素実 安部; 実人 木村; 志浩 田原


european microwave conference | 2010

A tandem 3-dB hybrid coupler using coupled lines with series capacitance

Motomi Abe; Yukihiro Tahara; Naofumi Yoneda

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