Yoji ISOTA


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 Accurate Measurement of LN Optical Intensity Modulators by Small RF Inputs
Tsutomu NAGATSUKA Yoshihito HIRANO Yoji ISOTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/02/01
Vol. E90-C  No. 2  pp. 474-478
Type of Manuscript:  Special Section PAPER (Special Section on Evolution of Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
LN optical intensity modulatorshighly accurate measurementhalfwave voltagechirp parameteroptical spectrum analyzer
 Summary | Full Text:PDF

A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs
Mitsuhiro SHIMOZAWA Noriharu SUEMATSU Kenji ITOH Yoji ISOTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/12/01
Vol. E89-C  No. 12  pp. 1821-1828
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Microwave Techniques)
Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits
Keyword: 
microwavemixerharmonic mixerdirect conversion receiver
 Summary | Full Text:PDF

Novel Phase-Continuous Frequency Hopping Control for a Direct Frequency Synthesizer Using a Quadrature Mixer Driven by Two DDSs
Kenichi TAJIMA Ryoji HAYASHI Kenji ITOH Yoji ISOTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/12/01
Vol. E89-C  No. 12  pp. 1829-1835
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Microwave Techniques)
Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits
Keyword: 
frequency synthesizerdirect digital synthesizerquadrature mixerphase accumulatoroverflowphase
 Summary | Full Text:PDF

An Even Harmonic Quadrature Mixer with a Simple Filter Configuration and an Integrated LTCC Module for W-CDMA Direct Conversion Receiver
Mitsuhiro SHIMOZAWA Kenichi MAEDA Eiji TANIGUCHI Keiichi SADAHIRO Takayuki IKUSHIMA Tamotsu NISHINO Noriharu SUEMATSU Kenji ITOH Yoji ISOTA Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 473-481
Type of Manuscript:  Special Section PAPER (Special Section on Advanced RF Technologies for Compact Wireless Equipment and Mobile Phones)
Category: 
Keyword: 
direct conversion receiverLTCCmodulequadrature mixerharmonic mixer
 Summary | Full Text:PDF

An Even Harmonic Mixer Using Self-Biased Anti-Parallel Diode Pair
Mitsuhiro SHIMOZAWA Takatoshi KATSURA Kenichi MAEDA Eiji TANIGUCHI Takayuki IKUSHIMA Noriharu SUEMATSU Kenji ITOH Yoji ISOTA Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/08/01
Vol. E86-C  No. 8  pp. 1464-1471
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
microwavemixerharmonic mixeranti-parallel diode pairself-bias
 Summary | Full Text:PDF

A Simple Design Method of the Planar Butler Matrix Using Thin Dielectric Substrate Metalized Both Side
Yoji ISOTA Osami ISHIDA Fumio TAKEDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/02/01
Vol. E86-C  No. 2  pp. 162-168
Type of Manuscript:  Special Section PAPER (Special Issue on Circuit and Device Technology for High-Speed Wireless Communication)
Category: Passive (Feeder)
Keyword: 
Butler matrixmulti beam antennaadaptive array antennabeam forming network
 Summary | Full Text:PDF

Low Spurious Frequency Setting Algorithm for a Triple Tuned Type PLL Synthesizer Driven by a DDS
Ken'ichi TAJIMA Yoshihiko IMAI Yousuke KANAGAWA Kenji ITOH Yoji ISOTA Osami ISHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 595-598
Type of Manuscript:  Special Section LETTER (Special Issue on Signals, Systems and Electronics Technology)
Category: 
Keyword: 
direct digital synthesizerphase locked loopspurious componenttriple tune
 Summary | Full Text:PDF

Distortion Characteristics of an Even Harmonic Type Direct Conversion Receiver for CDMA Satellite Communications
Hiroshi IKEMATSU Ken'ichi TAJIMA Kenji KAWAKAMI Kenji ITOH Yoji ISOTA Osami ISHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Vol. E82-C  No. 5  pp. 699-707
Type of Manuscript:  Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
direct conversionmixerdiodethird-order intermodulationnoise power ratio
 Summary | Full Text:PDF

An Asymmetrical Suspended Stripline Directional Coupler
Osami ISHIDA Yoji ISOTA Moriyasu MIYAZAKI Fumio TAKEDA Norio TAKEUCHI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/04/25
Vol. E69-E  No. 4  pp. 333-334
Type of Manuscript:  Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan)
Category: Microwave Circuits
Keyword: 
 Summary | Full Text:PDF