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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| MW | 2024-05-16 14:30 |
Osaka | Osaka University Toyonaka Campus (Primary: On-site, Secondary: Online) |
Improved image rejection with correction of I/Q amplitude and phase errors in an even harmonic quadrature mixer Takaaki Michishita, Kousuke Ito, Masaomi Tsuru, Naoki Sakai, Kenji Itoh (KIT)  MW2024-8 |
This paper describes improved image rejection with correction of I/Q amplitude and phase errors in an even harmonic quad... [more] | MW2024-8 pp.1-6 |
| AP, WPT (Joint) |
2024-01-17 14:25 |
Niigata | Tokimate, Niigata University (Primary: On-site, Secondary: Online) |
2.45 GHz High-Efficiency Power Amplifier for Integration and Cooperation of Telecommunication and Wireless Power Transfer Yuki Takagi, Yuta Nakamoto, Takashi Hirakawa, Yoshichika Ohta, Naoki Hasegawa (SB) WPT2023-30 |
In this paper, we present a transmitter configuration of wireless devices that is optimized for both information transmi... [more] | WPT2023-30 pp.1-5 |
| MW | 2023-11-16 11:15 |
Okinawa | Nago City Industrial Support Center (Okinawa) (Primary: On-site, Secondary: Online) |
Dual-Band Asymmetric Doherty Amplifier with T-shaped Stubs Yuki Takagi, Yoshichika Ohta (SB) MW2023-127 |
In this paper, we propose a design method for a dual-band asymmetric Doherty amplifier at 1.8 GHz(Band3)/2.1 GHz (Band1)... [more] | MW2023-127 pp.7-12 |
| OFT, OCS, LSJ (Joint) [detail] |
2023-08-25 10:20 |
Hokkaido | (Primary: On-site, Secondary: Online) |
A Study on Repetition Frequency Lockup in Regeneratively and Harmonically Mode-Locked Fiber Ring Laser by Using Phase-Locked Loop Yu Iwamoto, Joji Maeda (Tokyo Univ. of Science) OCS2023-24 |
Pulse self-oscillation based on regeneratively and harmonically mode-locking is extremely stable, though its repetition ... [more] | OCS2023-24 pp.27-32 |
| MW | 2022-12-16 11:25 |
Mie | Jingu-Kaikan(Ise) (Primary: On-site, Secondary: Online) |
[Invited Talk]
Increasing Efficiency of Power Amplifiers for Microwave Power Transfer by PA- Antenna Co-design Shinji Hara, Noriyuki Tanba (Nagoya Univ.), Hiroshi Hirayama (Nitech) MW2022-144 |
The efficiency is important in power amplifiers. For wireless communication applications which transfer signals, there a... [more] | MW2022-144 p.64 |
| MW | 2022-11-15 13:50 |
Nagasaki | Fukue-Bunka-Kaikan (Primary: On-site, Secondary: Online) |
Study on Power Consumption and Power Reduction of RF Power Amplifier in 5G Downlink System Yuki Takagi, Yoshichika Ohta (SB) MW2022-113 |
This paper proposes the estimation of power consumption of RF power amplifier in downlink (from base station to UE) comm... [more] | MW2022-113 pp.25-30 |
| AP | 2022-10-19 12:20 |
Gifu | GIFU CITY CULTURE CENTER (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Evaluation of Digital-to-RF Upconversion Using Harmonic Images of DAC Output by Simulation Sho Sarukawa, Hiroyuki Arai (Yokohama National Univ.) AP2022-124 |
In this paper, we performed simulation of digital-to-RF upconversion using harmonic images of DAC output and evaluated t... [more] | AP2022-124 pp.122-124 |
| EMCJ | 2022-04-15 13:55 |
Okinawa | (Primary: On-site, Secondary: Online) |
High Power Transmission System Using Crane Wire Rope Tatsuya Yoshii, Shinji Tsuzuki, Masashi Sugimoto (Ehime Univ.), Yuki Okanami (Mitsubishi Electr.) EMCJ2022-3 |
The authors have studied a crane wire system to transmit about 100 W of power and communication signals from the boom of... [more] | EMCJ2022-3 pp.13-18 |
| CAS, CS | 2022-03-04 11:25 |
Online | Online | Analysis of Relationship between Communications Forbidden Time Generation Mechanism and THD, odd order and even order THD in Power Line Communications (PLC) system Junya Aoki (Toyo Univ.), Kenji Kita (Daido Univ.), Hiroyasu Ishikawa (Nihon Univ.), Hideyuki Shinonaga (Toyo Univ.) CAS2021-91 CS2021-93 |
The authors have indicated that communications forbidden time not detecting packets occurs when a specific electrical eq... [more] | CAS2021-91 CS2021-93 pp.93-98 |
| EMM, EA, ASJ-H | 2021-11-16 09:00 |
Online | Online | [Poster Presentation]
Mode-matching with energy constraint of loudspeakers based on analytical approach Yuki Kawasaki, Makoto Otani (Kyoto Univ.) EA2021-49 EMM2021-76 |
Higher-Order Ambisonics (HOA) is a method of sound field reproduction, which usually uses mode matching to control expan... [more] | EA2021-49 EMM2021-76 pp.128-133 |
| WPT | 2021-03-05 10:45 |
Online | Online | Development of a Closed-loop Controlled Position Following System Utilizing Harmonic Reradiation from Rectenna Jie Chu, Bo Yang, Naoki Shinohara, Tomohiko Mitani (Kyoto Univ.) WPT2020-44 |
In this research, we investigated the position estimation system that uses the second harmonic reflection of the power r... [more] | WPT2020-44 pp.51-55 |
| US | 2021-02-22 17:40 |
Online | Online | Detection method of waterdrops on steel plate using ultrasonic oscillation Tomonori Kimura (MELCO), Akihiro Sakamoto (RSEC) US2020-76 |
A method to detect waterdrops on a steel plate by using ultrasonic oscillation is shown. Two angle beam probes are set ... [more] | US2020-76 pp.45-48 |
| US | 2021-01-29 16:50 |
Online | Online | Proposal of method of reducing harmonic distortion for parametric loudspeakerby signal addition and its distance dependence Shumpei Harada, Hideyuki Nomura (UEC) US2020-64 |
Parametric loudspeakers are super-directional sound source with sharp directivity by utilizing the nonlinear interaction... [more] | US2020-64 pp.38-43 |
| OME | 2020-12-25 13:20 |
Okinawa | Okinawaken Seinen Kaikan (Primary: On-site, Secondary: Online) |
Study on exciton and carrier dynamics at CuPc/MoO3 interface by using time-resolved second harmonic generation technique Keito Shimosawa, Dai Taguchi, Takaaki Manaka (Tokyo Tech.) OME2020-9 |
Organic semiconductors are attracting much attention as a photo detector, solar cell, and other optoelectronic devices. ... [more] | OME2020-9 pp.7-12 |
| EA, ASJ-H, EMM | 2020-11-20 09:00 |
Online | Online | [Poster Presentation]
Sound Field Recording Using Distributed Microphone Arrays Based on a Virtual Sphere Model Kosuke Katada, Shuichi Sakamoto (Tohoku Univ.) EA2020-23 EMM2020-38 |
Higher-order Ambisonics (HOA) is a sound field synthesis method based on wave equation. Sound field recorded at certain... [more] |
EA2020-23 EMM2020-38 pp.9-14 |
| SIP | 2020-08-28 11:20 |
Online | Online | [Invited Talk]
Blind source separation based on proximal splitting algorithm Kohei Yatabe (Waseda Univ.) SIP2020-36 |
This talk presents blind source separation (BSS) from multi-channel audio signals. BSS is methodology of estimating sepa... [more] | SIP2020-36 p.31 |
| SIS | 2020-03-06 14:40 |
Saitama | Saitama Hall (Cancelled but technical report was issued) |
An implusive noise detection method in noisy speech signals using the short time Fourier transform Sho Hasegawa, Eisuke Horita (Kanazawa Univ.) SIS2019-58 |
The short-time Fourier transform based method to detect impulsive noises from speech signals is expressed. Especially W... [more] | SIS2019-58 pp.119-124 |
| SP, EA, SIP | 2020-03-03 09:00 |
Okinawa | Okinawa Industry Support Center (Cancelled but technical report was issued) |
[Poster Presentation]
High Resolution Acoustic Analysis for Classification of Bell Crickets Hideto Otsuka, Fumikazu Saze, Kan Okubo (TMU) EA2019-146 SIP2019-148 SP2019-95 |
We have analyzed the sound of bell crickets in anechoic chamber using 768kHz/32bit high resolution recording system inc... [more] |
EA2019-146 SIP2019-148 SP2019-95 pp.261-265 |
| 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 |
| EA, ASJ-H, ASJ-AA | 2019-07-17 14:00 |
Hokkaido | SAPPORO COMMUNITY PLAZA | Time-frequency analysis based on short-time sinusoidal parameter estimation:
-- Unified realization of linear and wavelet structures and application to musical and speech sounds -- Shigeru Ando (Univ. Tokyo) EA2019-17 |
This paper describes a novel and unified method for cconstructing time-frequency spaces with linear and log-linear (wave... [more] | EA2019-17 pp.87-92 |
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