Broadband Multi-Way Microstrip Power Dividers. - Mitsuyoshi Kishihara; Kuniyoshi Yamane; Isao Ohta; Tadashi Kawai (IEICE Trans. Electron., 2005)

Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach. - Isao Ohta; Tadashi Kawai (IEICE Trans. Electron., 2005)

Multi-Stage, Multi-Way Microstrip Power Dividers with Broadband Properties. - Mitsuyoshi Kishihara; Isao Ohta; Kuniyoshi Yamane (IEICE Trans. Electron., 2006)

Miniature Broad-Band CPW 3-dB Branch-Line Couplers in Slow-Wave Structure. - Takao Fujii; Isao Ohta; Tadashi Kawai; Yoshihiro Kokubo (IEICE Trans. Electron., 2007)

Cruciform Directional Couplers in E-Plane Rectangular Waveguide. - Mitsuyoshi Kishihara; Isao Ohta; Kuniyoshi Yamane (IEICE Trans. Electron., 2007)

Parallel Coupled Microstrip Couplers Compensated with Periodic Floating-Conductors on Coupled Edges. - Takao Fujii; Isao Ohta; Tadashi Kawai; Yoshihiro Kokubo (IEICE Trans. Electron., 2008)

Dual-Band Wilkinson Power Dividers Using a Series RLC Circuit. - Tadashi Kawai; Yasuaki Nakashima; Yoshihiro Kokubo; Isao Ohta (IEICE Trans. Electron., 2008)

Analysis of Post-Wall Waveguide Based on H-Plane Planar Circuit Approach. - Mitsuyoshi Kishihara; Isao Ohta; Kensuke Okubo; Jiro Yamakita (IEICE Trans. Electron., 2009)

Band-Broadening Design Technique of CRLH-TLs Dual-Band Branch-Line Couplers Using CRLH-TLs Matching Networks. - Tadashi Kawai; Miku Nakamura; Isao Ohta; Akira Enokihara (IEICE Trans. Electron., 2010)

Shielded Structure of Composite Right/Left-Handed Transmission Line Using Substrate Integrated Waveguide and Floating-Conductor. - Kensuke Okubo; Mitsuyoshi Kishihara; Akifumi Ikeda; Jiro Yamakita; Isao Ohta (IEICE Trans. Electron., 2010)

Design of an H-Plane Waveguide Intersection with High Isolation. - Hiroaki Ikeuchi; Tadashi Kawai; Mitsuyoshi Kishihara; Isao Ohta (IEICE Trans. Electron., 2011)

Design of a Broadband Cruciform Substrate Integrated Waveguide Coupler. - Mitsuyoshi Kishihara; Isao Ohta; Kensuke Okubo (IEICE Trans. Electron., 2011)

Design and Fabrication of PTFE-Filled Waveguide Components by SR Direct Etching. - Mitsuyoshi Kishihara; Hiroaki Ikeuchi; Yuichi Utsumi; Tadashi Kawai; Isao Ohta (IEICE Trans. Electron., 2012)

Compact wideband rat-race hybrid utilizing composite right/left-handed transmission lines. - Yuma Sumitomo; Tadashi Kawai; Akira Enokihara; Isao Ohta; Kei Satoh; Yasunori Suzuki; Hiroshi Okazaki; Shoichi Narahashi (RWS, 2013)

Design methods for broadband 3dB branch-line and rat-race hybrids. - Tadashi Kawai; Isao Ohta; Akira Enokihara (IEICE Electron. Express, 2013)

Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines. - Tadashi Kawai; Yuma Sumitomo; Akira Enokihara; Isao Ohta; Kei Satoh; Yasunori Suzuki; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2014)

Left-Handed Waveguide Using Cutoff TM-Mode. - Mitsuyoshi Kishihara; Yuki Mizutani; Isao Ohta; Kensuke Okubo; Hironori Takimoto (IEICE Trans. Electron., 2016)

Improvement of Isolation Characteristics of Multi-Way Power Divider Using TE10-TEp0 Mode Transducer. - Mitsuyoshi Kishihara; Isao Ohta (IEICE Trans. Electron., 2018)

Fabrication of Integrated PTFE-Filled Waveguide Butler Matrix for Short Millimeter-Wave by SR Direct Etching. - Mitsuyoshi Kishihara; Masaya Takeuchi; Akinobu Yamaguchi; Yuichi Utsumi; Isao Ohta (IEICE Trans. Electron., 2018)

Design and Fabrication of PTFE Substrate Integrated Waveguide Coupler by SR Direct Etching. - Mitsuyoshi Kishihara; Masaya Takeuchi; Akinobu Yamaguchi; Yuichi Utsumi; Isao Ohta (IEICE Trans. Electron., 2021)

Design and Fabrication of PTFE Substrate-Integrated Waveguide Butler Matrix for Short Millimeter Waves. - Mitsuyoshi Kishihara; Kaito Fujitani; Akinobu Yamaguchi; Yuichi Utsumi; Isao Ohta (IEICE Trans. Electron., 2023)