Naoki KITA


Path Loss Model Considering Blockage Effects of Traffic Signs Up to 40GHz in Urban Microcell Environments
Motoharu SASAKI Minoru INOMATA Wataru YAMADA Naoki KITA Takeshi ONIZAWA Masashi NAKATSUGAWA Koshiro KITAO Tetsuro IMAI 
Publication:   
Publication Date: 2018/08/01
Vol. E101-B  No. 8  pp. 1891-1902
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
5Gpropagationpath losshigh frequencyblockageurbanmicrocell
 Summary | Full Text:PDF(6MB)

Evaluations for Estimation Method of the Distributed Array Antenna (DAA) Radiation Pattern by Experimental Analysis
Daisuke GOTO Fumihiro YAMASHITA Kouhei SUZAKI Hideya SO Yoshinori SUZUKI Kiyoshi KOBAYASHI Naoki KITA 
Publication:   
Publication Date: 2018/06/01
Vol. E101-B  No. 6  pp. 1494-1502
Type of Manuscript:  PAPER
Category: Satellite Communications
Keyword: 
the distributed array antenna (DAA)array patternarray factorantenna pattern estimationantenna pattern measurement
 Summary | Full Text:PDF(3.5MB)

Frequency Dependency of Path Loss Between Different Floors in An Indoor Office Environment at UHF and SHF Bands
Motoharu SASAKI Minoru INOMATA Wataru YAMADA Naoki KITA Takeshi ONIZAWA Masashi NAKATSUGAWA Koshiro KITAO Tetsuro IMAI 
Publication:   
Publication Date: 2018/02/01
Vol. E101-B  No. 2  pp. 373-382
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016)
Category: Propagation
Keyword: 
propagation5Gmillimeter waveUHFSHFhigh frequency bandsindoor officefloor penetration loss
 Summary | Full Text:PDF(8.2MB)

A 24 mW 5.7 Gbps Dual Frequency Conversion Demodulator for Impulse Radio with the First Sidelobe
Kaoru KOHIRA Naoki KITAZAWA Hiroki ISHIKURO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/10/01
Vol. E99-C  No. 10  pp. 1164-1173
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
clock recoveryimpulse radioUWBsidelobe
 Summary | Full Text:PDF(2.2MB)

Path Loss Model for Low Antenna Heights in Residential Areas at Middle VHF Band
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2093-2101
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
path loss modellow antenna heightmobile terminalresidential areaVHF band
 Summary | Full Text:PDF(7.4MB)

Path Loss Model with Low Antenna Height for Microwave Bands in Residential Areas
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/07/01
Vol. E96-B  No. 7  pp. 1930-1944
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
path loss modellow antenna heightmobile terminalresidential areamicrowave band
 Summary | Full Text:PDF(3.3MB)

Plane-Wave and Vector-Rotation Approximation Technique for Reducing Computational Complexity to Simulate MIMO Propagation Channel Using Ray-Tracing
Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3850-3860
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO propagation channel prediction techniqueray-tracing methodimaging algorithmsubstitution technique
 Summary | Full Text:PDF(1.6MB)

New Method for Evaluating Height Gain at Subscriber Station for Wireless Access Systems in Microwave Band
Naoki KITA Wataru YAMADA Akio SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2903-2914
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
height gainpath lossmicrowave bandBWAgeometrical optics
 Summary | Full Text:PDF(3.7MB)

Wideband Characteristics of Demmel Condition Number for 22 MIMO-OFDM Channels
Naoki KITA Wataru YAMADA Akio SATO Shuta UWANO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/05/01
Vol. E87-B  No. 5  pp. 1270-1272
Type of Manuscript:  Special Section LETTER (Special Section on Mobile Multimedia Communications)
Category: 
Keyword: 
MIMO-OFDM channelDemmel condition numberindoor MIMO channelspatial multiplexing
 Summary | Full Text:PDF(283.9KB)

Polarization Switchable Microstrip Antenna Using PIN Diodes
Dongkeun JUNG Takeshi FUKUSAKO Naoki KITAMURA Nagahisa MITA Cheunsoo HA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/01/01
Vol. E87-B  No. 1  pp. 152-157
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
patch antennapolarization switchingPIN diodeslot couplingdiversity
 Summary | Full Text:PDF(869.9KB)

A Path Loss Model in Residential Areas Based on Measurement Studies Using a 5.2-GHz/2.2-GHz Dual Band Antenna
Naoki KITA Shuta UWANO Akio SATO Masahiro UMEHIRA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 368-376
Type of Manuscript:  Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21st Century)
Category: 
Keyword: 
2.2 GHz5.2 GHz5.2-GHz/2.2-GHz dual band antennapath lossresidential areas
 Summary | Full Text:PDF(1.3MB)

PLL Frequency Synthesizer with Binary Phase Comparison
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 427-434
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerbinary phase comparison
 Summary | Full Text:PDF(959.1KB)

Prescaler PLL Frequency Synthesizer with Multi-Programmable Divider
Yasuaki SUMI Shigeki OBOTE Naoki KITAI Hidekazu ISHII Ryousuke FURUHASHI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 421-426
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerprescalermulti-programmable divider(N+1/2) programmable divider
 Summary | Full Text:PDF(1.1MB)

Speedup of Frequency Switching Time in PLL Frequency Synthesizers Using a Target Frequency Detector
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Kouichi SYOUBU Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 436-441
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizertarget frequency detectorfast frequency switching
 Summary | Full Text:PDF(450.8KB)