Papers - Hasegawa Koji
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3次元入射する平面波の回折格子散乱特性のハイブリッド・トレフツ有限要素法解析
佐藤慎悟 長谷川弘治,IEICE transactions on electronics,vol.J89-C,(1),(p.1 ~ 10),2006.01
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preparation of piezoelectric ceramic thin films and their applications to GHz-band surface acousticwave devices
H.Okano, K.Hasegawa, B.Ben-Nissan and O.C.Standard,Journal of Australasian Ceramics Society,vol.42,(2),(p.14 ~ 20),2006
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Analysis of scattering characteristics of diffraction gratings using hybrid Trefftz finite element method
S.Sato and K.Hasegawa,International Journal of microwave and optical technology,vol.1,(2),2006
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多層格子による平面波散乱特性のハイブリッド・トレフツ有限要素法解析
佐藤慎悟 長谷川弘治,計算数理工学論文集,vol.5,(2),(p.113 ~ 118),2005.12
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Propagation characteristics of surface acoustic waves on K3Li2Nb5O15
K.Hasgawa, Y.Ikeda and H.Okano,Japanese Journal of applied physics,vol.44,(6B),(p.4539 ~ 4543),2005.06
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Scattering characteristics analysis of diffraction grating using hybrid trefftz finite element method
佐藤慎悟 長谷川弘治,Transactions of the JASCOME Journal of boundary element methods,vol.21,(p.53 ~ 58),2004.12
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The temperature coefficient of frequency and quality factors at resonance and antiresonance frequencies of infinite interdigital transducers for leaky surface acoustic waves on a SiO2/IDT/36° Y-X LiTaO3 substrate
K.Hasegawa and M.Sakuma,Japanese Journal of applied physics,vol.43,(7A),(p.4398 ~ 4403),2004.07
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イオンプレーティング法による窒化アルミニウム薄膜の作製
岡野寛,増田知弘,道久明宏,長谷川弘治,真空,vol.47,(6),(p.452 ~ 456),2004.06
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Coupled-mode equations for interdigital transducers for leaky surface acoustic waves
Koji Hasegawa and MasanoriKoshiba,Japanese Journal of applied physics,vol.42,(5B),(p.3157 ~ 3160),2003.05
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電子ビーム蒸着法によるニオブ酸カリウム薄膜の作製
岡野寛,岡田光孝,宮脇功磨,中村茂昭,長谷川弘治,真空,vol.46,(3),(p.269 ~ 271),2003.03
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Parameters of coupled-mode equations for a natural-single-phase- unidirectional transducer on a La3Ga5.5Ta0.5O14 substrate
W.Tyua and K.Hasegawa,Japanese Journal of applied physics,vol.41,(5B),(p.3469 ~ 3472),2002.05
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Coefficients of coupled-mode equations for interdigital transducers with solid-electrodes ofgold, silver, tantalum, or tungsten alloy on a 50°Y-25°X La3Ga5SiO14 substrate
K.Hasegawa, K.Inagawa and M.Koshiba,Japanese Journal of applied physics,vol.41,(5B),(p.3473 ~ 3475),2002.05
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Study of electrode materials effect on NSPUDT properties of Langasite
S.Wang, R.Kimura,K.Yamaguchi, J.Harada, S.Uda andK.Hasegawa,Japanese Journal of applied physics,vol.40,(9B),(p.5710 ~ 5714),2001.09
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Extraction of all the coefficients of coupled-mode equations for natural-single-phase-unidirectional SAW transducers from dispersion characteristics computed by hybrid finite element method
K. Hasegawa, K. Inagawa and M. Koshiba,IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,vol.UFFC-48,(4),(p.1341 ~ 1350),2001.09
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An analysis of EWD-RDT on a La3Ga5.5Nb0.5O14 substrate
K. Inagawa , K. Hasegawa, and M. Koshiba,Japanese Journal of applied physics,vol.40,(5B),(p.3747 ~ 3750),2001.05
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Coefficients of coupled-mode equations for reversal of directivity transducers on a 50ヒ唳-25ヒ唸 La3Ga5SiO14 substrate
K.Hasegawa, K.Inagawa and M.Koshiba,Japanese Journal of applied physics,vol.40,(5B),(p.3751 ~ 3754),2001.05
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周期が1波長である周期構造弾性表面波導波路のハイブリッド有限要素法解析
長谷川弘治, 小柴正則,IEICE transactions on electronics,vol.J83-C,(10),(p.954 ~ 962),2000.10
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Coefficients of coupled-mode equations for a natural-single-phase-unidirectional transducer and an electrode-width-difference-reversal-of-directivity transducer on a 50ヒ唳-24ヒ唸 La3Ga5SiO14 substrate
K.Hasegawa, K.Inagawa and M.Koshiba,Japanese Journal of applied physics,vol.39,(5B),(p.3020 ~ 3023),2000.05
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Parameters of coupling-of-modes equations for NSPUDT on a La3Ga5.5Nb0.5O14 substrate
K.Inagawa, K.Hasegawa and M.Koshiba,Japanese Journal of applied physics,vol.39,(5B),(p.3014 ~ 3019),2000.05
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基板の異方性を用いた1方向性弾性表面波用すだれ状電極のモード結合方程式
長谷川弘治,稲川清, 小柴正則,IEICE transactions on electronics,vol.J82-C-I,(12),(p.735 ~ 743),1999.12