High-speed GaAs MESFET Digital IC Design for Optical Communication Systems. - Kimikazu Sano; Koichi Narahara; Koichi Murata; Taiichi Otsuji; Kiyomitsu Onodera (ASP-DAC, 1998)

Experimental characterization of short-pulse generation using switch lines. - Koichi Narahara; Akihiro Yokota (IEICE Electron. Express, 2008)

Characterization of Two-Stage Composite Right- and Left-Handed Transmission Lines. - Shun Nakagawa; Koichi Narahara (IEICE Trans. Electron., 2008)

Characterization of one- and two-dimensional switch lines for controlling traveling pulses. - Koichi Narahara (IEICE Electron. Express, 2009)

Amplification of short pulses in transmission lines periodically loaded with Schottky varactors. - Koichi Narahara (IEICE Electron. Express, 2009)

Short envelope pulse propagation in composite right- and left-handed transmission lines with regularly spaced Schottky varactors. - Jun Ogasawara; Koichi Narahara (IEICE Electron. Express, 2009)

Characterization of Left-Handed Traveling-Wave Transistors. - Shun Nakagawa; Koichi Narahara (IEICE Trans. Electron., 2009)

Experimental Observation of Oscillating Wave Propagation on Switch Lines for Generation of Continuous Electromagnetic Waves. - Koichi Narahara; Akihiro Yokota (J. Electr. Comput. Eng., 2009)

Dynamics of oscillating pulse edges in two-dimensional switch lines. - Koichi Narahara (IEICE Electron. Express, 2010)

Generation of short electrical pulses using nonlinear traveling-wave field effect transistors. - Koichi Narahara (IEICE Electron. Express, 2010)

Nonlinear traveling-wave field effect transistors for amplification of short electrical pulses. - Koichi Narahara; Shun Nakagawa (IEICE Electron. Express, 2010)

Experimental characterization of left-handed transmission lines with regularly spaced Schottky varactors. - Jun Ogasawara; Koichi Narahara (IEICE Electron. Express, 2010)

Reverse Doppler effect in left-handed travelling-wave field-effect transistors. - Koichi Narahara (IEICE Electron. Express, 2013)

Characterization of partially dissipated solitons in a traveling-wave field-effect transistor. - Koichi Narahara (Commun. Nonlinear Sci. Numer. Simul., 2014)

Efficiency of three-wave mixing in nonlinear composite right- and left-handed transmission lines. - Koichi Narahara (IEICE Electron. Express, 2014)

Soliton decay in composite right- and left-handed transmission lines periodically loaded with Schottky varactors. - Koichi Narahara (IEICE Electron. Express, 2014)

Harmonic resonance in a composite right-handed and left-handed transmission line periodically loaded with Schottky varactors. - Koichi Narahara (Int. J. Circuit Theory Appl., 2016)

Mutual synchronization of oscillating pulse edges in point-coupled transmission lines with regularly spaced tunnel diodes. - Koichi Narahara (Commun. Nonlinear Sci. Numer. Simul., 2017)

Experimental characterization of mutually synchronized voltage edges in point-coupled tunnel diode transmission lines. - Koichi Narahara (IEICE Electron. Express, 2017)

Numerical characterization of nonlinear oscillatory waves in a composite right- and left-handed traveling-wave field-effect transistor. - Koichi Narahara (Int. J. Circuit Theory Appl., 2017)

Mutiphase oscillator using dissipatively coupled transmission lines with regularly spaced tunnel diodes. - Koichi Narahara (Int. J. Circuit Theory Appl., 2017)

Characterization of a hard-type oscillator using series-connected tunnel diodes. - Koichi Narahara; Koichi Maezawa (IEICE Electron. Express, 2018)

Large-amplitude voltage edge oscillating in a transmission line with regularly spaced series-connected resonant-tunneling diodes. - Koichi Narahara; Koichi Maezawa (IEICE Electron. Express, 2018)

Dynamics of dissipative solitons developed in a closed traveling-wave field-effect transistor. - Koichi Narahara (Int. J. Circuit Theory Appl., 2018)

Full-wave analysis of traveling pulses developed in a system of transmission lines with regularly spaced resonant-tunneling diodes. - Koichi Narahara; Koichi Maezawa (Int. J. Circuit Theory Appl., 2018)

Frequency Divider Using One-Dimensional Tunnel-Diode Oscillator Lattice Systems. - Koichi Narahara (IEICE Trans. Electron., 2019)

Injection Locking of Rotary Dissipative Solitons in Closed Traveling-Wave Field-Effect Transistor. - Koichi Narahara (IEICE Trans. Electron., 2020)

Generation of Large-Amplitude Pulses through the Pulse Shortening Superposed in Series-Connected Tunnel-Diode Transmission Line. - Koichi Narahara (IEICE Trans. Electron., 2021)

Transition Dynamics of Multistable Tunnel-Diode Oscillator Used for Effective Amplitude Modulation. - Koichi Narahara; Koichi Maezawa (IEICE Trans. Electron., 2021)

Self-sustained solitary waves in a tunnel diode oscillator lattice and their applications in frequency division. - Koichi Narahara (Int. J. Circuit Theory Appl., 2021)

Broadband reduction of phase noise in a spatially extended tunnel-diode oscillator through multiple self-injection locking. - Koichi Narahara (Int. J. Circuit Theory Appl., 2022)

A frequency divider using interacting self-sustained pulses in a tunnel-diode-oscillator lattice. - Koichi Narahara (Int. J. Circuit Theory Appl., 2022)

Mutual synchronization of rotary pulses in coupled tunnel-diode oscillator lattice loops. - Koichi Narahara (Int. J. Circuit Theory Appl., 2023)

Enhanced Oscillation Frequency in Series-Connected Resonant-Tunneling Diode-Oscillator Lattice Loop. - Koichi Narahara; Koichi Maezawa (IEICE Trans. Electron., 2023)

Multiphase injection locking for multiple rotary pulses in a coupled oscillator lattice loop. - Koichi Narahara (Int. J. Circuit Theory Appl., 2024)

Trigger waves in an oscillator loop and their applications in voltage-controlled oscillation with high tuning gain. - Koichi Narahara (Int. J. Circuit Theory Appl., 2024)

Rotary Topological Defects in an Oscillator Lattice Loop and Their Injection Locked Properties. - Shunto Hirosawa; Koichi Narahara (Int. J. Circuit Theory Appl., 2025)