Hayashi Hitoshi


Hayashi Hitoshi

J-GLOBAL         Last updated: Dec 21, 2019 at 02:40
 
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Name
Hayashi Hitoshi
Affiliation
Sophia University
Section
Faculty of Science and Technology, Department of Information and Communication Sciences
Job title
Professor
Research funding number
70634963

Research Areas

 
 

Academic & Professional Experience

 
Sep 2000
 - 
Aug 2001
Massachusetts Institute of Technology(MIT)
 

Education

 
Apr 1990
 - 
Mar 1992
Graduate School, Division of Engineering, The University of Tokyo
 
Apr 1988
 - 
Mar 1990
Faculty of Engineering, The University of Tokyo
 
Apr 1986
 - 
Mar 1988
Faculty of Liberal Arts, The University of Tokyo
 

Awards & Honors

 
May 2013
IEICE Communications Society Excellent Paper Award
 

Published Papers

 
Estimation of muscle pain based on Twitter data
H. Okumura and H. Hayashi
IEEJ Transactions on Electrical and Electronic Engineering   14(6) 961-962   Jun 2019   [Refereed]
To estimate muscle pain, data from Twitter posts, or tweets, with and without symptomatic remarks were collected using the Twitter API. We performed morphological analysis, weighting by TF‐IDF, and calculation of the cosine similarity between the ...
Miniaturized Microstrip Dual-Band Branch-Line Crossover with Two Inner Open Stubs
Y. Cui and H. Hayashi
Progress In Electromagnetics Research Letters   82 59-64   Mar 2019   [Refereed]
In this letter, a microstrip dual-band band-pass crossover is proposed. By reducing the number of inner open stubs, miniaturization of a window-shaped crossover without reducing bandwidth can be achieved. An electromagnetic simulation and measurem...
Comparison of Performance by Activation Functions on Deep Image Prior
S. Fujii and H. Hayashi
International Conference on Artificial Intelligence in Information and Communication (ICAIIC 2019)   6B-2    Feb 2019   [Refereed]
In this paper, we compare the performance of activation functions on a deep image prior. The activation functions considered here are the standard rectified linear unit (ReLU), leaky rectified linear unit (Leaky ReLU), and the randomized leaky rec...
Miniaturized Branch-Line Coupler with Harmonic Suppression
K. Tokugawa, S. Kuwana, and H. Hayashi
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)   1096-1099   Jan 2019   [Refereed]
This paper presents a miniaturized branch-line coupler with harmonic suppression. By using a combination of a 45° open stub and a 45° short stub instead of using a 90° short stub, we can achieve harmonic suppression while maintaining good RF bandw...
Miniaturized Wilkinson Power Divider with DC Isolation
S. Xie and H. Hayashi
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)   1565-1569   Jan 2019   [Refereed]
This paper presents a miniaturized Wilkinson power divider with DC isolation. By using parallel coupled lines, we can achieve DC isolation while maintaining good RF bandwidth. We compare the proposed design with the previously proposed design. The...

Misc

 
Miniaturized Wilkinson Power Divider with DC Isolation
S. Xie and H. Hayashi
Progress In Electromagnetics Research Symposium Abstracts   1226-1226   Aug 2018   [Refereed]
Miniaturized Branch-line Coupler with Harmonic Suppression
K. Tokugawa, S. Kuwana, and H. Hayashi
Progress In Electromagnetics Research Symposium Abstracts   1090-1090   Aug 2018   [Refereed]
5Gのすべて 第11回 NICT/ATRによる無線の横断利用 上智大による広帯域移相器の小型化
石津、村上、新保、塚本、林
日経コミュニケーション   52-60   Jun 2016
5GMF(第5世代モバイル推進フォーラム)のキーパーソンが執筆する5G(第5世代移動通信システム)連載の第11回。今回はNICT/ATRが複数の無線システムの横断利用、上智大学が移相器の小型化・マルチバンド化をそれぞれ解説する。
(Invited presentation) "U-Bus Air" System – A Possible Solution for Realizing Next-generation Gas Metering System in Japan
HAYASHI HITOSHI
IEEE Radio & Wireless Week (RWW) 2013      Jan 2013   [Invited]
(proceedingsあり)

Books etc

 
Encyclopedia of RF and Microwave Engineering vol. 5 Radio-Frequency Identification Systems (RFID)
Hayashi Hitoshi (Part:Joint Work)
John Wiley & Sons, Inc.   Mar 2005   ISBN:978-0-471-27053-9
RF and Microwave Engineering is one of the fastest growth areas of the past decade and will probably continue to be a very active area of research and application in a large variety of fields. The six volume set of Encyclopedia of RF and Microwave...

Conference Activities & Talks

 
ラジアル オープンスタブを用いた広帯域高調波抑圧ウィルキンソン電力分配合成回路
林等
WTP2019   May 2019   
2つの内部オープンスタブを用いた小型化マイクロストリップ デュアルバンド ブランチライン クロスオーバー
林等
WTP2019   May 2019   
小型化高調波抑圧ブランチラインカプラ
林等
MWE2018   Nov 2018   
小型化DCブロッキング ウィルキンソン電力分配合成回路
林等
MWE2018   Nov 2018   
高速起動・低消費電力 符号化IC
林等
WTP2018   May 2018   

Patents

 
6566441 : 移相器
林 等
6524486 : 電力分配合成回路
林 等
EP1585280 (B1) : "Non-contact RF ID system communication method, non-contact RF ID system, transmitter, and receiver"
"H. Hayashi, M. Shimizu, T. Tsubaki"
"US 7,738,838" : "Non-contact RF ID system communication method, non-contact RF ID system, transmitter, and receiver"
"H. Hayashi, M. Shimizu, T. Tsubaki"
"EP 1,387,182" : Locating system and method for determining position of objects
"H. Hayashi, M. Shimizu, H. Suda, A. Shibuya"