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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 85  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
MW 2022-11-15
Nagasaki Fukue-Bunka-Kaikan
(Primary: On-site, Secondary: Online)
Improvement of Output Back-off Performance on Outphasing Operation by Using 50-Ω Design Power Amplifiers at Quasi-Millimeter-Wave Band
Nao Ashizawa, Kazuhiko Honjo, Ryo Ishikawa (UEC)
MW 2022-11-16
Nagasaki Fukue-Bunka-Kaikan
(Primary: On-site, Secondary: Online)
DC Voltage Synthesis of Sub-mW-Level 2.45-GHz-Band High-Efficiency Rectifiers with Zero-Threshold GaAs HEMTs for Wireless Power Transfer
Tsuyoshi Yoshida, Ryo Ishikawa, Kazuhiko Honjo (UEC)
MW 2022-11-16
Nagasaki Fukue-Bunka-Kaikan
(Primary: On-site, Secondary: Online)
DC-Feedback-Mode Zero-Threshold GaAs HEMT Rectifier and Voltage-Doubler Rectifier for Applying Negative Gate Bias to Microwave Power Amplifier
Taki Nagata, Kazuhiko Honjo, Ryo Ishikawa (UEC)
MW 2022-06-09
Nagano Naganoken Nokyo Building
(Primary: On-site, Secondary: Online)
A 4.5 GHz-Band GaN HEMT Outphasing Amplifier MMIC with Compact Output Combiner
Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo (UEC) MW2022-25
 [more] MW2022-25
ED, MW 2022-01-27
Online Online [Invited Lecture] A 28GHz-Band GaN HEMT Doherty Amplifier MMIC Based on Dual-Power-Level Design Technique
Ryo Ishikawa, Takuya Seshimo, Yoichiro Takayama, Kazuhiko Honjo (UEC) ED2021-67 MW2021-109
In the 5G wireless communication system, a quasi-millimeter wave band such as the 28 GHz band is also used. Doherty powe... [more] ED2021-67 MW2021-109
MW 2020-12-10
(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) MW2020-71
Recently, the need for large-capacity communications has increased in wireless communication systems due to the increase... [more] MW2020-71
MW 2020-12-10
(Primary: On-site, Secondary: Online)
High-Efficiency Wide-Dynamic-Power-Range Rectifier with Adaptive Self-Gate-Biasing
Jun Yamazaki, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2020-72
In RF energy harvesting and wireless power transfer, it is required to develop rectifiers having wide dynamic range char... [more] MW2020-72
MW 2020-12-10
(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) MW2020-73
Recently, due to the increase in the amount of information traffic, there has been a demand for higher speed and larger ... [more] MW2020-73
MW 2020-12-10
(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) MW2020-74
Recently, OAMmultiplexing using orbital angular momentum (OAM) of electromagnetic waves has been attracting attention, a... [more] MW2020-74
EMT, MW, OPE, EST, MWP, THz, IEE-EMT [detail] 2020-07-17
Online Online 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
MW 2019-11-14
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
MW 2019-11-14
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
MW 2019-11-14
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
MW 2019-11-15
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
MW, ICD 2019-03-14
Okinawa   A 10-MHz-Band Gate Zero-Bias Amplification/Rectification Module using Zero-Threshold Si MOS Transistor
Takaharu Kume, Ishikawa Ryo, Kazuhiko Honjo (UEC) MW2018-165 ICD2018-109
A high-efficiency amplification/rectification module has been developed at 10-MHz band for bidirectional wireless power ... [more] MW2018-165 ICD2018-109
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
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
MW 2018-11-15
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
MW 2018-11-15
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
MW 2018-11-15
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
 Results 1 - 20 of 85  /  [Next]  
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