Guided-Wave Electro-Optic Modulators Using Novel Electrode Structure of Coupled Microstrip Line Resonator. - Akira Enokihara; Hiroyoshi Yajima; Hiroshi Murata; Yasuyuki Okamura (IEICE Trans. Electron., 2005)

Guided-Wave EO Intensity Modulator Using Coupled Microstrip Line Electrode of Higher-Order Harmonic Resonance Combined with Polarization-Reversed Structure. - Akira Enokihara; Hiroyoshi Yajima; Hiroshi Murata; Yasuyuki Okamura (IEICE Trans. Electron., 2007)

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)

Investigation of Heating Effect by Microwave Irradiation for Phantoms and Plants. - Jingfan Xu; Tadashi Kawai; Akira Enokihara; Hiroshi Murakami (ICETET, 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)

Low Chirp Modulation by Electro-Optic Intensity Modulator Using Microwave 180-Degree Hybrid Directly Formed on LiNbO3 Substrate. - Akira Enokihara; Masashi Yamamoto; Tadashi Kawai; Tetsuya Kawanishi (IEICE Trans. Electron., 2015)

Compact Electro-Optic Single Sideband Modulators Utilizing Miniaturized Branch-Line Couplers on LiNbO3 Substrate. - Katsuyuki Yamamoto; Tadashi Kawai; Akira Enokihara; Tetsuya Kawanishi (IEICE Trans. Electron., 2015)

Design of Multi-Way LC-Ladder Dividers with Multi-Band Operation. - Yosuke Okada; Tadashi Kawai; Akira Enokihara (IEICE Trans. Electron., 2017)

A 920MHz Lumped-Element Wilkinson Power Divider Utilizing LC-Ladder Circuits. - Tadashi Kawai; Kensuke Nagano; Akira Enokihara (IEICE Trans. Electron., 2018)

Dual-Parallel Mach-Zehnder Modulator Integrated with 180-degree Hybrid for Compensation of Third-Order Intermodulation Distortion. - Daichi Furubayashi; Yuta Kashiwagi; Tadashi Kawai; Akira Enokihara; Naokatsu Yamamoto; Tetsuya Kawanishi (OECC/PSC, 2019)

Electro-Optic Modulator for Compensation of Third-Order Intermodulation Distortion Using Frequency Chirp Modulation. - Daichi Furubayashi; Yuta Kashiwagi; Takanori Sato; Tadashi Kawai; Akira Enokihara; Naokatsu Yamamoto; Tetsuya Kawanishi (IEICE Trans. Electron., 2020)

Mach-Zehnder Optical Modulator Integrated with Tunable Multimode Interference Coupler of Ti:LiNbO3 Waveguides for Controlling Modulation Extinction Ratio. - Anna Hirai; Yuichi Matsumoto; Takanori Sato; Tadashi Kawai; Akira Enokihara; Shinya Nakajima; Atsushi Kanno; Naokatsu Yamamoto (IEICE Trans. Electron., 2022)

Optical Mode Multiplexer Using LiNbO3 Asymmetric Directional Coupler Enabling Voltage Control for Phase-Matching Condition. - Shotaro Yasumori; Seiya Morikawa; Takanori Sato; Tadashi Kawai; Akira Enokihara; Shinya Nakajima; Kouichi Akahane (IEICE Trans. Electron., 2024)