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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 94  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
MW 2024-02-29
10:05
Okayama Okayama Prefectural University
(Primary: On-site, Secondary: Online)
A Study on Efficiency Improvement by Adjusting Drain Bias Voltage in a Distributed Amplifier
Kento Iwasaki, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2023-174
Increasing the communication capacity and speed is required for recent wireless communication systems.
Currently, many ... [more]
MW2023-174
pp.1-4
MW 2024-03-01
10:15
Okayama Okayama Prefectural University
(Primary: On-site, Secondary: Online)
28-GHz-Band GaN HEMT Outphasing Amplifier MMIC Designed by Considering Insertion Loss at Dual-Power-Level Optimization
Taiki Kobayashi, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2023-189
The development of the fifth generation mobile communications (5G) will use higher frequencies such as millimeter wave b... [more] MW2023-189
pp.74-77
MW 2023-12-21
16:25
Shizuoka Shizuoka University (Hamamatsu Campus)
(Primary: On-site, Secondary: Online)
A 28-GHz Loop antenna Arrays with Switching Diodes for OAM Beamforming
Tsuyoshi Yoshida, Akira Saitou, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2023-152
 [more] MW2023-152
pp.20-23
MW 2023-11-16
16:25
Okinawa Nago City Industrial Support Center (Okinawa)
(Primary: On-site, Secondary: Online)
Extension of Communication Distance via Dielectric-Lens Repeater for OAM Multiplexing Communications
Kaito Uchida, Akira Saitou, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2023-135
Recently, a multiplex communication utilizing orbital angular momentum (OAM) of electromagnetic waves has been attractin... [more] MW2023-135
pp.49-53
MW 2023-11-16
16:50
Okinawa Nago City Industrial Support Center (Okinawa)
(Primary: On-site, Secondary: Online)
One-to-many OAM Communication by Beam-steering Using Loop Antenna Array Displaced from Focus of Paraboloid
Kanki Kitayama, Akira Saitou, Kazuhiko Honjo, Ryo Ishikawa (The Univ. of Electro-Communications) MW2023-136
The beam-steering technique for an orbital angular momentum (OAM) wave is proposed and demonstrated for one-to-many OAM ... [more] MW2023-136
pp.54-58
MW 2023-11-17
09:55
Okinawa Nago City Industrial Support Center (Okinawa)
(Primary: On-site, Secondary: Online)
A Study on Wide-Dynamic-Range High-Efficiency GaN HEMT Rectifier System by Using Adaptive Gate Bias Controlling Rectifier
Taki Nagata, Jun Yamazaki, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2023-139
 [more] MW2023-139
pp.71-75
MW 2023-03-02
13:25
Tottori Tottori Univ.
(Primary: On-site, Secondary: Online)
Characteristic Improvement at Back-Off Region by Three-Power-Level Optimization for 3.7-GHz GaN HEMT Doherty Amplifier
Masataka Yamamoto, Kazuhiko Honjo, Yoichiro Yakayama, Ryo Ishikawa (UEC) MW2022-163
Increasing the communication capacity and speed is required for recent wireless communication systems. Digital modulated... [more] MW2022-163
pp.37-41
MW, ED 2023-01-27
16:15
Tokyo Kikai-Shinko-Kaikan Bldg.
(Primary: On-site, Secondary: Online)
[Invited Talk] Microwave Semiconductor Devices and Circuits for Industrial Innovation
Kazuhiko Honjo (UEC) ED2022-97 MW2022-156
For the past 100 years, the electron saturation velocity, which is an important parameter of semiconductors, has been ab... [more] ED2022-97 MW2022-156
pp.51-54
MW 2022-12-16
09:00
Mie Jingu-Kaikan(Ise)
(Primary: On-site, Secondary: Online)
Optimization of Concave Reflector and Feed-Point Azimuths on Loop-Antenna-Array OAM Multiplex Long-Range Communication System
Katsuya Ishihara, Akira Saitou, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2022-139
Utilizing the orbital angular momentum (OAM) of electromagnetic waves has recently been attracting attention for providi... [more] MW2022-139
pp.38-42
MW 2022-11-15
13:00
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) MW2022-111
In order to handle digital modulation signals used in beyond 5G systems, RF power amplifiers with a wide-dynamic-range c... [more] MW2022-111
pp.13-18
MW 2022-11-16
09:55
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, Kazuhiko Honjo, Ryo Ishikawa (UEC) MW2022-122
 [more] MW2022-122
pp.73-76
MW 2022-11-16
10:20
Nagasaki Fukue-Bunka-Kaikan
(Primary: On-site, Secondary: Online)
DC-Feedback-Mode Zero-Threshold GaAs HEMT Rectifier/Voltage-Doubler Diode Rectifier for Applying Negative Gate-Bias to Microwave Power Amplifier
Taki Nagata, Ryo Ishikawa, Kazuhiko Honjo (UEC) MW2022-123
In recent years, there has been much research on RF energy harvesting, which converts small electromagnetic waves in the... [more] MW2022-123
pp.77-80
MW 2022-06-09
14:25
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
pp.13-18
ED, MW 2022-01-27
15:30
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
pp.28-31
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) MW2020-71
Recently, the need for large-capacity communications has increased in wireless communication systems due to the increase... [more] MW2020-71
pp.1-6
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) MW2020-72
In RF energy harvesting and wireless power transfer, it is required to develop rectifiers having wide dynamic range char... [more] MW2020-72
pp.7-11
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) 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
pp.12-17
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) MW2020-74
Recently, OAMmultiplexing using orbital angular momentum (OAM) of electromagnetic waves has been attracting attention, a... [more] MW2020-74
pp.18-23
EMT, MW, OPE, EST, MWP, THz, IEE-EMT [detail] 2020-07-17
14:15
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
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
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