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Takashi OHIRA

Active Q Factor Analysis for Non-uniform Microstrip Stub Colpitts FET Oscillators Tuya WUREN Takashi OHIRA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/02/01 Vol. E94-A No. 2 pp. 583-591 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics) Category: Keyword: oscillator, Q factor, non-uniform microtrip line, FET, transconductance, microwave,
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Interference Canceller Based on Cycle-and-Add Property for Single User Detection in DS-CDMA Ranga HETTIARACHCHI Mitsuo YOKOYAMA Hideyuki UEHARA Takashi OHIRA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 298-306 Type of Manuscript: PAPER Category: Spread Spectrum Technologies and Applications Keyword: DS-CDMA, single user detection, interference cancellation, multiple access interference (MAI), PN sequences, cycle-and-add property, near-far problem (NFP),
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Pseudolinear Circuit Theory for Sinusoidal Oscillator Performance Maximization Takashi OHIRA Tuya WUREN
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2008/11/01 Vol. E91-C No. 11 pp. 1726-1737 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-wave Technologies) Category: INVITED Keyword: oscillator, NINO model, immittance-domain Barkhausen condition, equilibrium, active Q factor, circuit optimization criteria,
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FOREWORD Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2006/12/01 Vol. E89-C No. 12 pp. 1796-1797 Type of Manuscript: FOREWORD Category: Keyword:
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Spatial Fading Simulator Using a Cavity-Excited Circular Array (CECA) for Performance Evaluation of Antenna Arrays Chulgyun PARK Jun-ichi TAKADA Kei SAKAGUCHI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/03/01 Vol. E89-B No. 3 pp. 906-913 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: spatial fading simulator, cavity, CECA, antenna array performance evaluation,
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A Compact Espar Antenna with Planar Parasitic Elements on a Dielectric Cylinder Qing HAN Brett HANNA Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/06/01 Vol. E88-B No. 6 pp. 2284-2290 Type of Manuscript: Special Section PAPER (Special Section on 2004 International Symposium on Antennas and Propagation) Category: Keyword: Espar, dielectric, direction finder, genetic algorithm, miniaturization,
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Perturbation Analysis and Experimental Verification of Intermodulation and Harmonic Distortion for an Anti-Series Varactor Pair Qing HAN Keizo INAGAKI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/01/01 Vol. E88-C No. 1 pp. 89-97 Type of Manuscript: Special Section PAPER (Special Section on Recent Trends of Microwave and Millimeter-Wave Passive Circuit Components and Technologies for Improvement of Characteristics) Category: Keyword: anti-series-varactor-pair, abrupt p-n junction, nonlinear distortion, perturbation method,
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Harmonic Distortion Suppression Technique for Varactor-Loaded Parasitic Radiator Antennas Qing HAN Keizo INAGAKI Kyouichi IIGUSA Robert SCHLUB Takashi OHIRA Masami AKAIKE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/12/01 Vol. E85-C No. 12 pp. 2015-2021 Type of Manuscript: Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology) Category: Keyword: ESPAR antenna, varactor diode, nonlinear, harmonic distortion, reactive near-field measurement,
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Numerical Analysis of Nonlinear Distortion Generated from a Single Varactor and an Anti-Series Varactor Pair Masami AKAIKE Takashi OHIRA Keizo INAGAKI Qing HAN
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/12/01 Vol. E85-C No. 12 pp. 1990-1999 Type of Manuscript: Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology) Category: Keyword: nonlinear distortion, varactor, anti-series, harmonic distortion, nonlinear analysis,
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Reactive-Field Anechoic Box for ESPAR Antenna Measurement Qing HAN Keizo INAGAKI Kyouichi IIGUSA Robert SCHLUB Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/07/01 Vol. E85-C No. 7 pp. 1451-1459 Type of Manuscript: PAPER Category: Electromagnetic Theory Keyword: reactive-field anechoic box, backscattering characteristics, radio wave absorber, ESPAR antenna, reactive near field,
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Adaptive Control Algorithm of ESPAR Antenna Based on Stochastic Approximation Theory Blagovest SHISHKOV Jun CHENG Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2002/04/01 Vol. E85-B No. 4 pp. 802-811 Type of Manuscript: PAPER Category: Antenna and Propagation Keyword: adaptive beamforming, ESPAR antenna, interference reduction, rate of convergence, stochastic approximation,
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Adaptive Beamforming of ESPAR Antenna--Unconventional Approach Blagovest SHISHKOV Jun CHENG Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/03/01 Vol. E85-C No. 3 pp. 452-457 Type of Manuscript: Special Section PAPER (Special Issue on Signals, Systems and Electronics Technology) Category: Digital Transmission Keyword: ESPAR antenna, adaptive beamforming, stochastic approximation, interference reduction, convergence, gradient noise, Hessian,
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Fourier Optical Processing Beamforming Network Using Optical Waveguide Arrays and Lens for Transmission and Reception Tomohiro AKIYAMA Keizo INAGAKI Yoshihiko MIZUGUCHI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/09/01 Vol. E84-B No. 9 pp. 2413-2420 Type of Manuscript: Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems) Category: Millimeter-Wave Antennas Keyword: optically controlled array antenna, optical signal processing, phased array antenna, optical waveguide, beamforming network,
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Adaptive Beamforming of ESPAR Antenna Based on Steepest Gradient Algorithm Jun CHENG Yukihiro KAMIYA Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/07/01 Vol. E84-B No. 7 pp. 1790-1800 Type of Manuscript: Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications) Category: Beamformer Techniques Keyword: gradient algorithm, adaptive beamforming, mobile user terminal, interference reduction, low complexity,
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An Optical Waveguide with High Birefringence and Birefringence Dispersion for Optical Beamforming Network in Multibeam Array Antenna Weiwei HU Keizo INAGAKI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/07/01 Vol. E84-B No. 7 pp. 1801-1807 Type of Manuscript: Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications) Category: Beamformer Techniques Keyword: Ti:LiNbO₃ optical waveguide, birefringence, optical beamforming network, multibeam phase array antenna,
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S-Band Mobile Satellite Communications and Multimedia Broadcasting Onboard Equipment for ETS-VIII Yoichi KAWAKAMI Shigetoshi YOSHIMOTO Yasushi MATSUMOTO Takashi OHIRA Toshiyuki IDE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/10/20 Vol. E82-B No. 10 pp. 1659-1666 Type of Manuscript: PAPER Category: Satellite Communication Keyword: S-band, mobile satellite communication, satellite broadcasting, handheld terminals, geostationary satellite,
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New Design Approach to Multiple-Beam Forming Network for Beam-Steerable Phased Array Antennas Fumio KIRA Kenji UENO Takashi OHIRA Hiroyo OGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1999/07/20 Vol. E82-C No. 7 pp. 1195-1201 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology) Category: Phased Arrays and Antennas Keyword: multi-beam matrix, beam steering, BFN, phased array antenna, satellite communication onboard systems,
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Higher-Order Analysis on Phase Noise Generation in Varactor-Tuned Oscillators-- Baseband Noise Upconversion in GaAs MESFET Oscillators-- Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/12/20 Vol. E76-C No. 12 pp. 1851-1854 Type of Manuscript: LETTER Category: Microwave and Millimeter Wave Technology Keyword: microwave, oscillator, phase noise, varactor, perturbation,
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Very Small MMIC Variable Frequency and Q Factor Active Bandpass Filters Using Novel Positive and Negative Feedback Design Techniques Hideo SUWAKI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/06/20 Vol. E76-C No. 6 pp. 919-924 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions) Category: Keyword: MMIC, filter, feedback, Q-factor, unity coupler,
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A GaAs Monolithic Sampling Phase Frequency Comparator for Extending the Pull-In Range of Microwave Phase-Locked Oscillators Tadao NAKAGAWA Tetsuo HIROTA Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/06/20 Vol. E76-C No. 6 pp. 944-949 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions) Category: Keyword: sampling, phase frequency comparator, MMIC, Ku-band, pull-in range,
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Low-Noise MMIC Phase-Locked Oscillators Using an EXOR and a PFC Tadao NAKAGAWA Hideo SUWAKI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/06/20 Vol. E76-C No. 6 pp. 950-954 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions) Category: Keyword: phase noise, MMIC, PLO, PFC, EXOR,
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Variational formula for Magnetostatic Wave Resonators and Its Applications Takashi OHIRA Makoto TSUTSUMI Nobuaki KUMAGAI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1983/10/20 Vol. E66-E No. 10 pp. 581-584 Type of Manuscript: PAPER Category: Microwaves and Millimeter Waves Keyword:
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Experimental Observation of Delay of Magnetostatic Waves in a Partially Magnetized YIG Slab Makoto TSUTSUMI Yoshihiko MASAOKA Takashi OHIRA Nobuaki KUMAGAI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1979/07/20 Vol. E62-E No. 7 pp. 481-482 Type of Manuscript: LETTER Category: Microwaves and Millimeter Waves Keyword:
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