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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 31  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
ED, MW 2024-01-25
14:50
Tokyo Kikai-Shinko-Kaikan Bldg.
(Primary: On-site, Secondary: Online)
Study on Traps in GaN HEMTs using Low-frequency Y11 and Y22
Toshiyuki Oishi, Shiori Takada (Saga Univ.), Ken Kudara, Yutaro Yamaguchi, Shintaro Shinjo, Koji Yamanaka (Mitsubishi Electric Corp.) ED2023-67 MW2023-159
 [more] ED2023-67 MW2023-159
pp.7-10
COMP 2023-12-22
10:00
Miyazaki Miyazaki Univ. Machinaka Campus Approximation Algorithms for Generalizations of Strong Connectivity Augmentation Problem
Ryoma Norose, Yutaro Yamaguchi (Osaka Univ.) COMP2023-16
A directed graph G is said to be strongly connected if there exists a directed path between any pair of vertices in G. S... [more] COMP2023-16
pp.1-5
COMP 2023-12-22
11:25
Miyazaki Miyazaki Univ. Machinaka Campus [Invited Talk] Fast Algorithms for Maximum Matching Problem
Yutaro Yamaguchi (Osaka Univ.) COMP2023-19
Initiated by Edmonds' blossom algorithm (1965), a variety of algorithms for finding a maximum matching in general graphs... [more] COMP2023-19
p.20
ED, MWPTHz 2023-12-22
13:40
Miyagi RIEC, Tohoku Univ.
(Primary: On-site, Secondary: Online)
[Invited Talk] Device Modeling Techniques for Millimeter-wave Band GaN Amplifiers
Yutaro Yamaguchi, Shintaro Shinjo (Mitsubishi Electric), Yasuyuki Miyamoto (Titech) ED2023-62 MWPTHz2023-72
 [more] ED2023-62 MWPTHz2023-72
pp.40-45
MW 2023-11-16
13:00
Okinawa Nago City Industrial Support Center (Okinawa)
(Primary: On-site, Secondary: Online)
A Ka-band Three-Stage GaN MMIC Doherty Power Amplifier with Wideband Tee-line Doherty Network for 5G Applications
Keigo Nakatani, Yutaro Yamaguchi, Ko Kanaya, Akihito Hirai (Mitsubishi Electric) MW2023-128
 [more] MW2023-128
pp.13-18
MW 2023-11-17
12:30
Okinawa Nago City Industrial Support Center (Okinawa)
(Primary: On-site, Secondary: Online)
A Distributed Model with a High Scaling Accuracy for Sub-THz band GaN-HEMTs
Yutaro Yamaguchi, Ken Kudara, Shintaro Shinjo, Koji Yamanaka (Mitsubishi Electric Corp.), Yasuyuki Miyamoto (Titech) MW2023-142
 [more] MW2023-142
pp.87-91
MW, AP
(Joint)
2023-09-28
10:10
Kochi Kochi Castle Museum of History
(Primary: On-site, Secondary: Online)
C-Ku-band GaN MMIC Low Noise Amplifier Using Frequency Selective Parallel Feedback Circuit
Ken Kudara, Jun Kamioka, Eigo Kuwata, Yutaro Yamaguchi, Yoshitaka Kamo, Shintaro Shinjo (Mitsubishi Electric) MW2023-81
This paper represents a C-Ku band GaN MMIC low noise amplifier (LNA) for a transmitter and receiver module. In order to ... [more] MW2023-81
pp.7-10
MW, ED 2023-01-27
12:50
Tokyo Kikai-Shinko-Kaikan Bldg.
(Primary: On-site, Secondary: Online)
Effects of GaN traps in GaN HEMTs to Low Frequency Y22 Parameters -- Device Simulation Study --
Shogo Morokuma (Saga Univ.), Tomohiro Otsuka (Mitsubishi Electric), Toshiyuki Oishi (Saga Univ.), Yutaro Yamaguchi, Shintaro Shinjo, Koji Yamanaka (Mitsubishi Electric) ED2022-91 MW2022-150
GaN HEMTs are used in high frequency and power electronics applications. Advanced systems demand improvement of characte... [more] ED2022-91 MW2022-150
pp.29-32
CPM, ED, LQE 2022-11-24
14:35
Aichi Winc Aichi (Aichi Industry & Labor Center)
(Primary: On-site, Secondary: Online)
Evaluation of Fe Induced Trap in GaN HEMTs using Low-Frequency Y22 Measurement
Taiki Nishida, Toshiyuki Oishi (Saga Univ.), Tomohiro Otsuka, Yutaro Yamaguchi, Shintaro Shinjo, Koji Yamanaka (Mitsubishi Elec. Corp.) ED2022-34 CPM2022-59 LQE2022-67
One issue in improving amplifier performance using GaN is evaluating the characteristics of traps. In this study, we eva... [more] ED2022-34 CPM2022-59 LQE2022-67
pp.49-52
ED, MW 2022-01-27
13:40
Online Online Effects of Load Impedances at Third Order Intermodulation Tones
Eigo Kuwata, Yutaro Yamaguchi, Masaomi Tsuru (Mitsubishi Electric), Johannes Benedikt (Cardiff University) ED2021-63 MW2021-105
This paper reports on new multitone active loadpull measurements at the specific frequencies of third order intermodulat... [more] ED2021-63 MW2021-105
pp.7-11
COMP 2020-12-04
10:00
Online Online A Fast ZDD-Based Method for Enumerating All Solutions of Cost-Bounded Combinatorial Problems
Shin-ichi Minato (Kyoto Univ.), Mutsunori Banbara (Nagoya Univ.), Takashi Horiyama (Hokkaido Univ.), Jun Kawahara (Kyoto Univ.), Ichigaku Takigawa (Hokkaido Univ.), Yutaro Yamaguchi (Kyushu Univ.) COMP2020-19
 [more] COMP2020-19
pp.8-15
ED, MW 2020-01-31
15:35
Tokyo Kikai-Shinko-Kaikan Bldg. Analysis of Self-heating Effect of GaN HEMTs with Buffer Traps by Low Frequency S-parameters Measurements and TCAD Simulation
Tomohiro Otsuka, Yutaro Yamaguchi, Shintaro Shinjo (Mitsubishi Electric), Toshiyuki Oishi (Saga Univ.) ED2019-103 MW2019-137
 [more] ED2019-103 MW2019-137
p.53
MW 2019-11-14
15:10
Okinawa Minami Daido Villa. Tamokuteki Koryu Center A Ka-Band CW 15.5W 15.6% Fractional Bandwidth GaN Power Amplifier MMIC Using Wideband BPF Inter-stage Matching Network
Keigo Nakatani, Yutaro Yamaguchi, Masatake Hangai, Shintaro Shinjo (MitsubishiElectric) MW2019-105
This paper has reported a Ka-band 15.5W power amplifier Monolithic Microwave Integrated Circuit (MMIC) using 0.15m Gall... [more] MW2019-105
pp.29-34
COMP 2018-12-12
13:30
Miyagi Tohoku University [Invited Talk] 0/1/all CSPs, Half-Integral A-path Packing, and Linear-Time FPT Algorithms
Yoichi Iwata (NII), Yutaro Yamaguchi (Osaka Univ.), Yuichi Yoshida (NII) COMP2018-35
0/1/all CSPs can be solved in linear time by a simple DFS called a unit propagation.
We consider an optimization varian... [more]
COMP2018-35
p.23
MW 2018-11-15
10:50
Nagasaki Fukue Cultural Hall A Ka-Band High Efficiency Doherty Power Amplifier MMIC using GaN-HEMT for 5G Application
Keigo Nakatani, Yutaro Yamaguchi, Yuji Komatsuzaki, Shintaro Shinjo (Mitsubishi Electric) MW2018-94
 [more] MW2018-94
pp.13-18
EST, MW, OPE, MWP, EMT, IEE-EMT, THz [detail] 2018-07-19
15:25
Hokkaido   A Ka-band GaN Large-Signal Model Considering Trap Effect on Non-linear Capacitance by Using Transient S-parameters Measurement
Yutaro Yamaguchi, Tomohiro Otsuka, Masatake Hangai, Shintaro Shinjo (Mitsubishi Electric Corp.), Toshiyuki Oishi (Saga Univ.) EMT2018-30 MW2018-45 OPE2018-33 EST2018-28 MWP2018-29
 [more] EMT2018-30 MW2018-45 OPE2018-33 EST2018-28 MWP2018-29
pp.125-130
COMP 2018-03-05
11:00
Osaka Osaka Prefecture Univ. [Invited Talk] Stochastic Packing Integer Programs with Few Queries
Takanori Maehara (RIKEN), Yutaro Yamaguchi (Osaka Univ./RIKEN) COMP2017-47
We consider a stochastic variant of the packing-type integer linear programming problem, which contains random variables... [more] COMP2017-47
p.17
MW, EMCJ, EST, IEE-EMC [detail] 2017-10-20
16:40
Akita Yupopo Demonstration of Uniform Heating Distribution Control for Microwave Heating Small Reactor with Solid-State Oscillators
Kazuhiro Iyomasa, Yoshifumi Kawamura, Ryota Komaru, Yutaro Yamaguchi, Keigo Nakatani, Takeshi Shiode, Koji Yamanaka, Kazutomi Mori, Hiroshi Fukumoto (Melco) EMCJ2017-58 MW2017-110 EST2017-73
(To be available after the conference date) [more] EMCJ2017-58 MW2017-110 EST2017-73
pp.171-175
MW, ED 2017-01-27
13:00
Tokyo Kikai-Shinko-Kaikan Bldg. Physical model of GaN HEMT on Si including temperature dependence of RF leakage current in substrates
Yutaro Yamaguchi, Shintaro Shinjo, Koji Yamanaka (Mitsubishi Electric corp.), Toshiyuki Oishi (Saga univ.) ED2016-107 MW2016-183
 [more] ED2016-107 MW2016-183
pp.57-62
MW, ED 2017-01-27
13:25
Tokyo Kikai-Shinko-Kaikan Bldg. Study on dependence of passivation stress for electrical characteristics of AlGaN/GaN HEMTs by TCAD simulation
Toshiyuki Oishi (Saga univ.), Yutaro Yamaguchi, Koji Yamanaka (Mitsubishi Electric corp.) ED2016-108 MW2016-184
Effects of passivation residual stress on electrical characteristics for GaN HEMTs have been studied by using a TCAD sim... [more] ED2016-108 MW2016-184
pp.63-68
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