Masatoshi NAKAYAMA


High-Power GaN HEMT T/R Switch Using Asymmetric Series-Shunt/Shunt Configuration
Masatake HANGAI Yukinobu TARUI Yoshitaka KAMO Morishige HIEDA Masatoshi NAKAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1533-1538
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Devices and Circuits
Keyword: 
T/R switchGaN HEMThigh-powerseries-shunt/shunt configuration
 Summary | Full Text:PDF

A Post-Wall Waveguide Matched Load with Thin-Film Resistor
Hiromitsu UCHIDA Masatoshi NAKAYAMA Akira INOUE Yoshihito HIRANO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1579-1585
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Passive Devices and Circuits
Keyword: 
waveguidematched loadresistor
 Summary | Full Text:PDF

Efficiency Enhancement of a Digital Predistortion Doherty Amplifier Transmitter Using a Virtual Open Stub Technique
Kenichi HORIGUCHI Satoru ISHIZAKA Masatoshi NAKAYAMA Ryoji HAYASHI Yoji ISOTA Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/09/01
Vol. E90-C  No. 9  pp. 1670-1677
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Devices/Circuits
Keyword: 
power amplifiermicrowave Doherty amplifierefficiencyorthogonal frequency division multiplexing (OFDM)predistortion
 Summary | Full Text:PDF

Highly Stable 6-18 GHz 2.3 dB Low-Noise Amplifier with Resistive-Loaded Series Feedback Circuits
Hidenori YUKAWA Yukinobu TARUI Koh KANAYA Hiromitsu UCHIDA Masatoshi NAKAYAMA Yasushi ITOH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/12/01
Vol. E86-C  No. 12  pp. 2445-2451
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Trends on Microwave and Millimeter Wave Application Technology)
Category: Amplifier
Keyword: 
microwaveamplifierwidebandlow-noiseGaAs
 Summary | Full Text:PDF

An 18 GHz-Band MMIC Diode Linearizer Using a Parallel Capacitor with a Bias Feed Resistance
Kazuhisa YAMAUCHI Masatoshi NAKAYAMA Yukio IKEDA Akira AKAISHI Osami ISHIDA Naoto KADOWAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/08/01
Vol. E86-C  No. 8  pp. 1486-1493
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
amplifierlinearizerdistortionintermodulation distortionmicrowavesatelliteAPAA
 Summary | Full Text:PDF

Feedforward Power Amplifier Control Method Using Weight Divided Adaptive Algorithm
Kenichi HORIGUCHI Atsushi OKAMURA Masatoshi NAKAYAMA Yukio IKEDA Tadashi TAKAGI Osami ISHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/08/01
Vol. E86-C  No. 8  pp. 1494-1500
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
normalized least mean squareadaptive algorithmfeedforwardpower amplifiermicrowave
 Summary | Full Text:PDF

A High Efficiency Bias Condition Optimized Feedforward Power Amplifier with a Series Diode Linearizer
Kenichi HORIGUCHI Masatoshi NAKAYAMA Yuji SAKAI Kazuyuki TOTANI Haruyasu SENDA Yukio IKEDA Tadashi TAKAGI Osami ISHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1973-1980
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
feedforward power amplifierspre-distortionbias conditionsoptimizationbase station
 Summary | Full Text:PDF

An Efficient Large-Signal Modeling Method Using Load-Line Analysis and Its Application to Non-linear Characterization of FET
Yukio IKEDA Kazutomi MORI Masatoshi NAKAYAMA Yasushi ITOH Osami ISHIDA Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/07/01
Vol. E84-C  No. 7  pp. 875-880
Type of Manuscript:  Special Section PAPER (Special Issue on Techniques for Constructing Microwave Simulators--Design and Analysis Tools for Electromagnetic Fields, Circuits, and Antennas--)
Category: Modeling of Nonlinear Microwave Circuits
Keyword: 
microwaveamplifierFETmodelingnonlinear analysis
 Summary | Full Text:PDF

A Distortion Analysis Method for FET Amplifiers Using Novel Frequency-Dependent Complex Power Series Model
Kenichi HORIGUCHI Kazuhisa YAMAUCHI Kazutomi MORI Masatoshi NAKAYAMA Yukio IKEDA Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Vol. E82-C  No. 5  pp. 737-743
Type of Manuscript:  Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
distortionanalysisFET amplifiersfrequency characteristicscomplex power seriesnonlinear
 Summary | Full Text:PDF

A 1. 9 GHz Single-Chip RF Front-End GaAs MMIC with Low-Distortion Cascode FET Mixer
Masatoshi NAKAYAMA Kenichi HORIGUCHI Kazuya YAMAMOTO Yutaka YOSHII Shigeru SUGIYAMA Noriharu SUEMATSU Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Vol. E82-C  No. 5  pp. 717-724
Type of Manuscript:  Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
GaAs MMICsingle-chip front-endmixercascode FETlow distortion
 Summary | Full Text:PDF

Improvement of Adjacent Channel Leakage Power and Intermodulation Distortion by Using a GaAs FET Linearizer with a Large Source Inductance
Kazutomi MORI Kazuhisa YAMAUCHI Masatoshi NAKAYAMA Yasushi ITOH Tadashi TAKAGI Hidetoshi KUREBAYASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/06/25
Vol. E80-C  No. 6  pp. 775-781
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeterwave High-power Devices)
Category: 
Keyword: 
microwaveamplifierlinearizerintermodulation distortionadjacent chamel leakage power
 Summary | Full Text:PDF

A New GaAs Negative Voltage Generator for a Power Amplifier Applied to a Single-Chip T/R-MMIC Front-End
Kazuya YAMAMOTO Kosei MAEMURA Nobuyuki KASAI Yutaka YOSHII Yukio MIYAZAKI Masatoshi NAKAYAMA Noriko OGATA Tadashi TAKAGI Mutsuyuki OTSUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/12/25
Vol. E79-C  No. 12  pp. 1741-1750
Type of Manuscript:  PAPER
Category: Semiconductor Materials and Devices
Keyword: 
negative voltage generatorGaAs MESFETpower amplifireMMIC front-end
 Summary | Full Text:PDF

Direct Efficiency and Power Calculation Method and Its Application to Low Voltage High Efficiency Power Amplifier
Kazutomi MORI Masatoshi NAKAYAMA Yasushi ITOH Satoshi MURAKAMI Yasuharu NAKAJIMA Tadashi TAKAGI Yasuo MITSUI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/09/25
Vol. E78-C  No. 9  pp. 1229-1236
Type of Manuscript:  Special Section PAPER (Special Issue on Ultra-High-Speed Electron Devices)
Category: 
Keyword: 
calculation methodamplifierMMIChigh efficiencyhigh powerlow-voltage
 Summary | Full Text:PDF