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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 87  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
MW 2020-12-10
13:15
Kanagawa
(Primary: On-site, Secondary: Online)
A 3.9-GHz-Band GaN HEMT Outphasing Power Amplifier with Reactance-Compensation Compact Combiner
Ryoichi Ogasawara, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC)
 [more]
MW 2020-12-10
13:40
Kanagawa
(Primary: On-site, Secondary: Online)
High-Efficiency Wide-Dynamic-Power-Range Rectifier with Adaptive Self-Gate-Biasing
Jun Yamazaki, Ryo Ishikawa, Kazuhiko Honjo (UEC)
 [more]
MW 2020-12-10
14:05
Kanagawa
(Primary: On-site, Secondary: Online)
Circular Loop Antenna Array for OAM Multiplex Communication Shared for Wireless Power Transfer
Wataru Wada, Ryo Ishikawa, Akira Saitou, Hisanosuke Miyake, Haruki Kikuchi, Hiroshi Suzuki, Kazuhiko Honjo (UEC)
 [more]
MW 2020-12-10
14:30
Kanagawa
(Primary: On-site, Secondary: Online)
Circular Loop Antenna Array Integrated on Low-Permittivity Substrate for OAM Multiplexing Communication Systems
Haruki Kikuchi, Akira Saito, Hisanosuke Miyake, Wataru Wada, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo (UEC)
 [more]
EMT, MW, OPE, EST, MWP, THz, IEE-EMT [detail] 2020-07-17
14:15
Online Video Conf. Study on Series Connected Harmonic-Tuned GaN HEMT Doherty Power Amplifier for Directly Exciting a Loop Antenna of OAM communication with Balanced Mode
Masahiro Nakada, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24
A series-connected harmonic-tuned GaN HEMT Doherty amplifier (DA) has been developed for directly exciting a loop antenn... [more] EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24
pp.101-106
MW 2019-11-14
14:05
Okinawa Minami Daido Villa. Tamokuteki Koryu Center Gate Switching-Mode Low Power Transistor Rectifier using Enhancement-Mode GaAs HEMT
Tsuyoshi Yoshida, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-103
In an RF energy-harvesting utilizing environmental electromagnetic waves, a high-efficiency rectifier is required to con... [more] MW2019-103
pp.19-24
MW 2019-11-14
15:35
Okinawa Minami Daido Villa. Tamokuteki Koryu Center High-Efficiency GaN HEMT Doherty Power Amplifier Based on Two-Power-Level Impedance Optimization including Harmonic Treatment
Takuya Seshimo, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-106
Further high efficiency and high functionality of power amplifier are required for the next generation wireless communic... [more] MW2019-106
pp.35-39
MW 2019-11-14
16:00
Okinawa Minami Daido Villa. Tamokuteki Koryu Center High Efficiency Doherty Amplifier Using T-Shaped Stabs with Spurius Suppression and Impedance Conversion Function
Yuki Takagi, Naoki Hasegawa, Yoshichika Ota (SB), Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-107
In recent years, various types of wireless stations such as a base station used on quasi-millimeter wave band have been ... [more] MW2019-107
pp.41-46
MW 2019-11-15
09:30
Okinawa Minami Daido Villa. Tamokuteki Koryu Center Suppression of interference wave by resistor installation for OAM Communication using Loop Arrays Antenna
Hisanosuke Miyake, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2019-111
As a novel multiplexing method for wireless communications, OAM (Orbital Angular Momentum) is attracting attention due t... [more] MW2019-111
pp.65-70
OFT 2019-05-16
16:00
Osaka I-site NANBA [Poster Presentation] Twist effect on strain sensitivity of plastic fiber Bragg gratings
Tianyi Ma, Ryo Ishikawa, Heeyoung Lee (Tokyo Tech), Antreas Theodosiou, Kyriacos Kalli (CUT), Yosuke Mizuno, Kentaro Nakamura (Tokyo Tech) OFT2019-11
 [more] OFT2019-11
pp.45-50
RCS, SR, SRW
(Joint)
2019-03-07
09:50
Kanagawa YRP Vector Potential Analysis on OAM Waves Generated by Circular-Array and Loop Antennas
Hiroshi Suzuki, Akira Saitou, Kazuhiko Honjo, Ryo Ishikawa (The Univ. of Electro-Commun.) RCS2018-313
Digital radio signal transmission systems utilizing the mode orthogonality generated by the orbital angular momentum (OA... [more] RCS2018-313
pp.163-168
RCS, SR, SRW
(Joint)
2019-03-08
11:20
Kanagawa YRP Multi-Band RF Hardware Techniques for 5G Mobile Communication Systems
Yasushi Yamao, Kazuhiko Honjo, Ryo Ishikawa, Yoichiro Takayama, Akira Saito (UEC) RCS2018-325
R & D of 5G mobile communication systems are intensively conducted as joint projects by industries, academia and the gov... [more] RCS2018-325
pp.219-224
MW 2018-11-15
10:25
Nagasaki Fukue Cultural Hall Miniaturization of Harmonic Impedance Transformer and its Application to Class-F Amplifiers
Kento Saiki, Shinichi Tanaka (Shibaura Inst. of Tech.), Ryo Ishikawa, Kazuhiko Honjo (Univ. of Electro-Communications) MW2018-93
A new method of miniaturizing the quarter-wavelength ($lambda$/4) harmonic impedance (Z) transformer in a class-F amplif... [more] MW2018-93
pp.7-12
MW 2018-11-15
15:20
Nagasaki Fukue Cultural Hall Evaluation for OAM-MIMO Communication Using Loop Antenna Array
Hiroto Otsuka, Ryohei Yamagishi, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2018-101
Orbital angular momentum (OAM) is attracting attention in terms of a novel multiplexing method. Multiplexing in OAM comm... [more] MW2018-101
pp.49-52
MW 2018-11-15
15:45
Nagasaki Fukue Cultural Hall Advanced Mode Unity Using Loop Array Proximate to Reflector for OAM Communication
Ryohei Yamagishi, Hiroto Otsuka, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2018-102
Advanced 4-channel multiplexing performance for short- and long-range orbital-angular-momentum (OAM) is demonstrated usi... [more] MW2018-102
pp.53-57
MW 2018-11-16
13:15
Nagasaki Fukue Cultural Hall [Special Talk] Report on 2018 IEEE MTT-S International Microwave Symposium
Takashi Shimizu (Utsunomiya Univ.), Ryo Ishikawa (UEC), Tetsuya Ueda (Kyoto Inst. of Tech.), Masataka Ohira (Saitama Univ.), Hiroshi Okazaki (NTT DOCOMO), Yuji Komatsuzaki (Mitsubishi Electric Corp.), Tamura Masaya (TUT) MW2018-110
 [more] MW2018-110
pp.95-102
EST, MW, EMCJ, IEE-EMC [detail] 2018-10-18
16:35
Aomori Hachinohe Chamber of Commerce and Industry(Hachinohe city, Aomori) GaN HEMT Darlington Power Amplifier with Individual Bias Adjustment for High-Efficiency and Low-Distortion Characteristics
Atsushi Kitamura, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMCJ2018-45 MW2018-81 EST2018-67
Multi-transistor configurations are widely applied for improving the performance of transistor amplifiers. In the multi-... [more] EMCJ2018-45 MW2018-81 EST2018-67
pp.71-75
OFT 2018-10-11
16:00
Miyagi Touhoku Univ. [Poster Presentation] Simple and accurate Bragg wavelength demodulation method in multimode plastic FBGs
Tianyi Ma, Ryo Ishikawa, Heeyoung Lee (Tokyo Tech), Antreas Theodosiou, Kyriacos Kalli (CUT), Yosuke Mizuno, Kentaro Nakamura (Tokyo Tech) OFT2018-42
For strain sensing applications, we develop a simple and accurate demodulation method for fiber Bragg gratings (FBGs) in... [more] OFT2018-42
pp.133-136
OFT 2018-10-11
16:00
Miyagi Touhoku Univ. [Poster Presentation] Temperature dependence of FBG inscribed in perfluorinated plastic optical fiber
Ryo Ishikawa, Heeyoung Lee (Tokyo Tech), Antreas Theodosiou, Kyriacos Kalli (CUT), Yosuke Mizuno, Kentaro Nakamura (Tokyo Tech) OFT2018-43
 [more] OFT2018-43
pp.137-140
OFT 2018-10-12
10:00
Miyagi Touhoku Univ. [Invited Talk] Report on APOS2018
Yosuke Mizuno, Heeyoung Lee, Ryo Ishikawa, Sonoko Hagiwara (Tokyo Tech) OFT2018-50
The 7th Asia-Pacific Optical Sensors Conference (APOS2018) was held from May 28 to 31, 2018, in Matsue, Shimane, Japan. ... [more] OFT2018-50
pp.167-170
 Results 1 - 20 of 87  /  [Next]  
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