Yasuyuki OKAMURA


Millimeter-Wave Radar Receiver Using Z-Cut LiNbO3 Optical Modulator with Orthogonal-Gap-Embedded Patch-Antennas on Low-k Dielectric Material
Yusuf Nur WIJAYANTO Atsushi KANNO Hiroshi MURATA Tetsuya KAWANISHI Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/08/01
Vol. E98-C  No. 8  pp. 783-792
Type of Manuscript:  Special Section PAPER (Special Section on Microwave Photonics)
Category: MWP Device and Application
Keyword: 
LiNbO3 optical modulatorpatch-antennalow-k dielectric materialmillimeter-wave radar
 Summary | Full Text:PDF(2.8MB)

Wireless Microwave-Optical Signal Conversion in Quasi-Phase-Matching Electro-Optic Modulators Using Gap-Embedded Patch-Antennas
Yusuf Nur WIJAYANTO Hiroshi MURATA Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/02/01
Vol. E96-C  No. 2  pp. 212-219
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
optical modulatorquasi-phase-matchingelectro-optic effectpatch antenna
 Summary | Full Text:PDF(2.5MB)

Electro-Optic Modulators Using Double Antenna-Coupled Electrodes for Radio-over-Fiber Systems
Naohiro KOHMU Hiroshi MURATA Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/02/01
Vol. E96-C  No. 2  pp. 204-211
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
electro-optic modulatorpatch antennaresonant electrodemillimeter-waveradio-over-fiber
 Summary | Full Text:PDF(3.2MB)

High-Speed LiTaO3 Optical Polarization Modulator Using Traveling-Wave Electrode and Double Periodic Poling Structure
Hiroshi MURATA Asuka TAKAHASHI Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/02/01
Vol. E92-C  No. 2  pp. 212-216
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: 
Keyword: 
polarization modulationlithium tantalate (LiTaO3)optical waveguidetraveling-wave modulationpolarization reversal
 Summary | Full Text:PDF(491.8KB)

Beam Scanning Comb-Line Antenna Loading Movable Dielectric Plate
Kazuhiro KITATANI Takahiko TERADA Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2213-2218
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Antennas
Keyword: 
microstrip antennacomb-linemechanical beam scandielectric
 Summary | Full Text:PDF(388.2KB)

Guided-Wave EO Intensity Modulator Using Coupled Microstrip Line Electrode of Higher-Order Harmonic Resonance Combined with Polarization-Reversed Structure
Akira ENOKIHARA Hiroyoshi YAJIMA Hiroshi MURATA Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/05/01
Vol. E90-C  No. 5  pp. 1096-1104
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: LiNbO3 Devices
Keyword: 
EO modulatorresonant electrodehigher order harmonic resonancepolarization reversed structuretransit-time effectLiTaO3
 Summary | Full Text:PDF(729.7KB)

Guided-Wave Electro-Optic Modulators Using Novel Electrode Structure of Coupled Microstrip Line Resonator
Akira ENOKIHARA Hiroyoshi YAJIMA Hiroshi MURATA Yasuyuki OKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 372-378
Type of Manuscript:  Special Section PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
modulatoroptical waveguideresonator electrodemillimeter-waveradio-on-fiber
 Summary | Full Text:PDF(612KB)

Measurement of a Depth Profile in a Random Medium Using Coherent Backscattering of Light
Yasuyuki OKAMURA Sadahiko YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/12/25
Vol. E83-C  No. 12  pp. 1809-1813
Type of Manuscript:  Special Section PAPER (Special Issue on Problems of Random Scattering and Electromagnetic Wave Sensing)
Category: Scattering and Propagation in Random Media
Keyword: 
random mediumcoherent backscatteringimage processingtarget tracking
 Summary | Full Text:PDF(561.2KB)

Enhanced Backscattering from Random Media with Multiple Suspensions
Yasuyuki OKAMURA Hiroyuki KAI Sadahiko YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/10/25
Vol. E82-C  No. 10  pp. 1853-1856
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
enhanced backscatteringrandom mediaparticle suspensionscamera observation system
 Summary | Full Text:PDF(547.9KB)