- Koyu Chinen, Shoko Nakamoto, "A 2.4-7GHz Dual Band Microstrip Patch Antenna (DB-MPA)," The International Journal of Engineering and Science (IJES), vol.13, no.10, pp.12 - 22, (2024).

- Koyu Chinen, Shoko Nakamoto, "Transmission Coefficient Measurements Using a 2.48-4.7 GHz Lateral Multiband Microstrip Patch Antenna (MB-MPA)”, International Journal of Electrical and Computer Engineering Research, vol.4, no.3, pp.1-7, (2024).

- Koyu Chinen, Shoko Nakamoto, "Alcohol Solutions Impedance and Equivalent Circuits”, International Journal of Electrical and Computer Engineering Research, vol. 4, no. 2, pp.1-7, (2024).

- Koyu Chinen, Shoko Nakamoto, "Plant Cell Vacuolar Impedance And Equivalent Circuit”, IOSR Journal of Electronics and Communication Engineering (IOSR-JECE), vol. 19, iss. 3, ser. 1, pp.18-26, (2024).

- Koyu Chinen, Shoko Nakamoto, "Relationship Between Impedance Transition Point and Cell Wall in Plant Tissue," Quest Journals Journal of Electronics and Communication Engineering Research, Vol.10, Iss. 3, pp: 09-18, (2024)

- Koyu Chinen, Shoko Nakamoto, "A Tiny 2.4 GHz Monopole Water Antenna," International Journal of Electronics and Telecommunications, vol.69, no.3, pp.455-460, (2023).

- Koyu Chinen, Shoko Nakamoto, "RF Analysis of Fruit and Vegetables using Equivalent Circuits Deduced from S-parameters," International Journal of Electrical and Computer Engineering Research, vol. 3, no.2, pp.18-24, (2023).

- Koyu Chinen, Shoko Nakamoto, "Two-port Equivalent Circuits Deduced from S-parameter Measurements of NaCl Solutions,” IETE Journal of Research, 05 Jun. IF 1.877, pp.1–9, (2022).

(2) WiMAX/RoF

Miku Teruya, Koyu Chinen, "Co-modulation of WDM-FDM WiMAX-FM and IEEE802.11ac Signals by DFB-LD and MZM," International Conference of Global Network for Innovative Technology (IGNITE) , Penang, Malaysia, Oral35, 27-29  Jan (2016)

- Miku Teruya, Kotoyo Irei, Ichiko Kinjo, and Koyu Chinen, "Directly Modulated WDM-FDM OFDM Signals Externally Modulated with IEEE802.11ac Signals at a MZM," The 2015 Asia Communications and Photonics Conference and Exhibition (ACP), Hongkong, China, ASu2A.85, Nov.19-23 (2015)

- Miku Teruya, Koyu Chinen, "1550nm Wavelength Division Multiplexing and Frequency Division Multiplexing in Radio-over-Fiber Transmission using OFDM Signals,"  The 2014 Asia Communications and Photonics Conference and Exhibition (ACP), Shanghai, ATh2E.4,Nov.11-14 (2014)

- Koyu Chinen and Shoko Nakamoto, " EVM Co-simulation of Optical Components and OFDM RoF System by Using P-parameter with Phase parameter," The 2014 Asia Communications and Photonics Conference and Exhibition (ACP), Shanghai, ATh2E.5, Nov.11-14 (2014)

- Shoko Nakamoto, Koyu Chinen, "Nonlinear Co-simulation of Component and System Using a New Parameter for WiMAX, "Journal of International Council on Electrical Engineering,　Voｌ3，No.3, July (2013) pp.240-244

- Shoko Nakamoto, Koyu Chinen, "Co-Simulation of Nonlinear Compornents and WiMAX System Using a New Parameter,"  The 8th International Conference on Wireless Communications, Networking and Mobile Computing(WiCOM), Shanghai, China, Sep.21-23 (2012)

- Koyu Chinen, Shoko Nakamoto, " Relative Constellation Error Analysis at Optical Transmiter for WiMAX Radio over Fiber," The 8th International Conference on Wireless Communications, Networking and Mobile Computing(WiCOM), Shanghai, China, Sep.21-23 (2012)

- Kazuya Nakao, Koyu Chinen, "WiMAX-10Gb/s Optical Transceiver Link Using EAM-LD, "International Symposium on Technology for Sustainability (ISTS),Thailand, Nov.21-24 (2012)

- Kazuya Nakao,  Koyu Chinen," WiMAX-10Gb/s Optical Transceiver Link Using EAM-LDAsia-Pacific Microwave Photonics Conference (APMP) 2012, Kyoto, PA-13, Apr. 25-27 (2012)  

- Shoko Nakamoto, Koyu Chinen,"Nonlinear Co-simulation of Components and System Using a New parameter for WiMAXThe International Conference on Elrctrical Engineering 2012 (ICEE), Kanazawa, July 8-12 (2012)

- Shoko Nakamoto, Koyu Chinen,"EVM Simulation Using Various Nonlinear Models of Amplifier for WiMAX International Conference on Electrical, Computer, Electronics and Communication Engineering (ICECECE2012), Paris, Aug 22-23(2012)

- Koyu Chinen , Shoko Nakamoto, "Analysis of Erratic Fluctuation of RCE at WiMAX RoF using 1310nm MQW DFB-LD Transmitter and APD-TIA Receiverternational Conference on Electrical, Computer, Electronics and Communication Engineering (ICECECE2012), Paris, Aug 22-23 (2012), pp1314-1318

- Koyu Chinen, ”RCE Induced by Optical Multi-Mode Oscillation at DFB-LD for WiMAX RoF,” OECC, Busan, Korea, P1-4, July 2-6 , (2012)

- Koyu Chinen and Shoko Nakamoto, " EVM Co-simulation of Optical Components and OFDM RoF System by Using P-parameter with Phase parameter," The 2011 Asia Communications and Photonics Conference and Exhibition (ACP), Shanghai, ATh2E.5, Nov.11-14 (2011)

- Koyu Chinen, ”The Optimum Link Design Using a Linear PIN-PD for WiMAX RoF Communication,” Photodiodes, INTEC, Chap.3, (2011)

- Koyu Chinen,  “The Optimum Link Design Using a Linear PIN-PD for WiMAX RoF Communication,” Photodiodes- Communications, Bio-Sensings, Measurements, and High-Energy Physics , ISBN 978-953-307-277-7, INTEC, (2011)

- Koyu Chinen,  “SONET/SDH overlay at a Spectrum Window on WiMAX Radio-over-Fiber,” Opto-Electronics and Communications  Conference (OECC), Taiwan, July 6-8, 7P3-119, pp.763-764 (2011)

- Koyu Chinen, Haruka  Mikamori, and　Hiroki  Kamehama, “A Radio-over-Fiber  link design for WiMAX Global Area Network,”　Opto-Electronics and Communications Conference (OECC), Sapporo, July 7-9 (2010)

(3) 　Humanbody impedance

- Koyu Chinen, Ichiko Kinjo, Aki Zamami, Kotoyo Irei and Kanako Naganuma, "New equivalent-electrical circuit model and a practical measurement method for human body impedance,"  Bio-Medical Materials and Engineering, vol. 26, no. s1, pp. S779-S786 (2015)

- Koyu Chinen, Ichiko Kinjo, Aki Zamami, Kotoyo Irei and Kanako Naganuma, "New equivalent-electrical circuit model and a practical measurement method for human body impedance ," The 4th International Conference on Biomedical Engineering and Biotechnology (iCBEB2015), Shanghai, China, Aug. 18-21 (2015)

(4) 　Electric circuit education

- Koyu  Chinen, Haruka Mikamori, “ Experience-based Learning Program for Electronic Circuit Design,”   World Academy of Science, Engineering and Technology, 77, pp.814-817, (2011)

- Koyu  Chinen, “ A multi-step comprehensive  experience-based  learning program for electronic circuit design education,”   The 3rd International Symposium on Advances in Technology Education, Singapore,  Sep. 22 - 24 (2009)

- Koyu Chinen, “An LSI Circuit Education System Using Remote Controllable Equipment Network,” The International Conference   on Technology Communication and Education(ICTCE), Kuwait, April 7-9 (2008)

- Koyu Chinen, Yuki Uchima, “ Satellite-Receiving-System Overlay with WDM Radio-over-Fiber on 10Gb/s Link,”  Asia Communications and Photonics Conference and Exhibition (ACP), Shanghai, Nov. 2-6 (2009)