Keizo CHO


FOREWORD
Keizo CHO 
Publication:   
Publication Date: 2017/02/01
Vol. E100-B  No. 2  pp. 194-194
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(110.5KB)

Operating Mechanism of Small Quad-Band Printed Antenna Comprising Symmetrically Arranged Trapezoidal Elements and Rectangle Strip Elements
Makoto SUMI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2050-2058
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
module antennatrapezoidal elementomni-directionalprinted antennamonopole antennamultiband antennaM2Moffset fed dipolefolded dipole
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Reduction in Mutual Coupling Characteristics of Slot-Coupled Planar Antenna due to Rectangular Elements
Huiling JIANG Ryo YAMAGUCHI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/07/01
Vol. E95-B  No. 7  pp. 2368-2376
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
filter integrated antennabase station antennamutual coupling reductionbroadband antenna
 Summary | Full Text:PDF(2.6MB)

Low-Profile Design of Metasurface Considering FSS Filtering Characteristics
Yuki KAWAKAMI Toshikazu HORI Mitoshi FUJIMOTO Ryo YAMAGUCHI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/02/01
Vol. E95-B  No. 2  pp. 477-483
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
metasurfacePMCFSSlow-profile
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A Small Broadband Omni-Directional Printed Antenna Comprising Symmetrically Arranged Trapezoid Elements
Makoto SUMI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/04/01
Vol. E94-B  No. 4  pp. 960-967
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
module antennatrapezoid elementomni-directionalprinted antennamonopole antenna
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A Low-Profile Dual-Polarized Directional Antenna for Enhancing Channel Capacity in Indoor MIMO Systems
Daisuke UCHIDA Hiroyuki ARAI Yuki INOUE Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2570-2577
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Antennas
Keyword: 
MIMOradiation patternpolarizationchannel capacitylow-profile antenna
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Bandwidth Characteristic Improvement of Filter Integrated Antenna Composed of Aperture Coupled Patch Antenna by Using Trapezoidal Elements
Huiling JIANG Ryo YAMAGUCHI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3960-3963
Type of Manuscript:  LETTER
Category: Antennas and Propagation
Keyword: 
RF integrated antennamutual couplingbase station antenna
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Multiple Antenna Performance of Quarter-Wavelength Monopole Antennas for Card-Type Terminal
Yoshiki OKANO Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/09/01
Vol. E91-B  No. 9  pp. 2948-2955
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
antennas for mobile terminalMultiple Input Multiple Output (MIMO)monopole antennasmutual coupling
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Third-Order Intermodulation Measurements for Superconducting Bandpass Filters
Hisashi SATO Keizo CHO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/05/01
Vol. E87-C  No. 5  pp. 708-713
Type of Manuscript:  Special Section PAPER (Special Section on Advances in Characterization and Measurement Technologies for Microwave and Millimeter-Wave Materials, Devices and Circuits)
Category: General Methods, Materials, and Passive Circuits
Keyword: 
high-temperature superconductorsmicrowave filterspower-handling capabilitythird-order intermodulationNdBa2Cu3O7
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Offset Beam Planar Antenna Employing Low Loss Triangular Dielectric Phase Shifter
Naoki HONMA Fumio KIRA Tamami MARUYAMA Keizo CHO Hideki MIZUNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/09/01
Vol. E86-B  No. 9  pp. 2720-2727
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
planar antennaarray antennadielectric phase shiftermicrostrip line
 Summary | Full Text:PDF(1.3MB)

Cellular and PHS Base Station Antenna Systems
Hiroyuki ARAI Keizo CHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/03/01
Vol. E86-B  No. 3  pp. 980-992
Type of Manuscript:  INVITED PAPER (Special Issue on Historical Review of Antenna Systems in Japan)
Category: 
Keyword: 
cellular systemphase shiftermulti band antennadiversity antennaPHSadaptive antenna
 Summary | Full Text:PDF(1.1MB)

Adaptive Base Station Antenna Configuration Suitable for Street Microcells Considering Propagation Environment
Keizo CHO Kentaro NISHIMORI Toshikazu HORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 435-442
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
adaptive antennastreet microcellbase station antennaelement arrangementangle of arrival of delayed waves
 Summary | Full Text:PDF(775.8KB)

A Novel Configuration for Realizing Automatic Calibration of Adaptive Array Using Dispersed SPDT Switches for TDD Systems
Kentaro NISHIMORI Keizo CHO Yasushi TAKATORI Toshikazu HORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2516-2522
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Adaptive Antennas
Keyword: 
adaptive arrayTDD systemsdispersed switchesautomatic calibration method
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Bidirectional Rod Antennas Comprising a Narrow Patch and Parasitic Elements
Keizo CHO Toshikazu HORI Kenichi KAGOSHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2482-2489
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Mobile Antennas
Keyword: 
base station antennabidirectionalpatch antennaantenna efficiencyrod antenna
 Summary | Full Text:PDF(232.5KB)

Adaptive Array for Reducing High-Power CCI on Asynchronous TDD Systems
Kentaro NISHIMORI Keizo CHO Yasushi TAKATORI Toshikazu HORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1727-1734
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Adaptive Algorithms and Experiments
Keyword: 
adaptive arrayasynchronous TDD systemspower inversionMMSEguard time
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Two Base Station Configuration Using an Adaptive Array at Elevated Locations for Microcell Systems
Kentaro NISHIMORI Keizo CHO Yasushi TAKATORI Toshikazu HORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/08/25
Vol. E83-B  No. 8  pp. 1688-1696
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
adaptive arrayelevated base stationco-channel interferencemicrocellelement spacing
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Adaptive Array Employing Eigenvector Beam of Maximum Eigenvalue and Fractionally-Spaced TDL with Real Tap
Yasushi TAKATORI Keizo CHO Kentaro NISHIMORI Toshikazu HORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/08/25
Vol. E83-B  No. 8  pp. 1678-1687
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
adaptive arraydigital beamformingeigenvector beamhigh-speed wireless accessfractionally-spaced-tapped-delay-line
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Bidirectional Rod Antennas Comprising Collinear Antenna and Parasitic Elements
Keizo CHO Toshikazu HORI Hajime TOZAWA Shinji KIYA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/06/25
Vol. E81-B  No. 6  pp. 1255-1260
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
base station antennabidirectional antennarod antennamicrocell system
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High-Temperature Superconducting Small Helical Antenna
Keiichiro ITOH Osamu ISHII Yasuhiro KOSHIMOTO Keizo CHO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/02/25
Vol. E75-C  No. 2  pp. 246-251
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
superconductive electronicsantennas
 Summary | Full Text:PDF(532.2KB)