Search Results:　 1-20 of 128

1

Loss Reduction of Longitudinal-Type Leaky Surface Acoustic Wave by Reverse Proton Exchange

Kakio Shoji , Abe Masaya

… The longitudinal-type leaky surface acoustic wave (LLSAW) is one of the SAW modes that is advantageous for application to high-frequency SAW devices. …

Jpn J Appl Phys 51(7), 07GC17-07GC17-5, 2012-07-25

The Japan Society of Applied Physics
2

Study of Relationship between Cut Angle of Substrate and Characteristics of Surface Acoustic Wave Resonators with Shape-Controlled SiO2

Takayama Ryoichi , Nakanishi Hidekazu , Goto Rei , Satoh Takahiro , Hashimoto Ken-ya

… This study provides the relationship between cut angles of the rotated Y--X LiTaO3 (LT) substrate and characteristics of surface acoustic wave (SAW) resonators with shape-controlled SiO2 in the SiO2/Al/LT system. … The 32--48° Y-cut of LT is well known as the leaky-SAW (LSAW) cut of LT. The propagation characteristics of an LSAW are affected by the surface condition of the substrate, and the optimum cut of LT should be determined with respect to such condition. …

Jpn J Appl Phys 51(7), 07GC16-07GC16-5, 2012-07-25

The Japan Society of Applied Physics
3

Polarization Control by Leaky Surface Acoustic Wave in Reverse-Proton-Exchanged LiNbO3 Optical Waveguide

Kakio Shoji , Sato Sho

… Polarization control of the optical guided wave in a new configuration using a reverse-proton-exchanged (RPE) LiNbO3 straight waveguide and a leaky surface acoustic wave (LSAW) which propagates perpendicular to the straight waveguide was proposed. … When a Love-type SAW on a proton-exchanged layer/YX-LiNbO3 was assumed, comparable perturbations to those in conventional Bragg diffraction due to a Rayleigh wave were confirmed. …

Jpn J Appl Phys 51(7), 07GC12-07GC12-5, 2012-07-25

The Japan Society of Applied Physics
4

2Pb3-10 Polarization Control by Leaky SAW in Reverse-Proton-Exchanged LiNbO_3 Optical Waveguide(Poster Session)

Sato Sho , Kakio Shoji

Proceedings of Symposium on Ultrasonic Electronics (32), 231-232, 2011-11-08

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5

2Pb3-8 Loss Reduction of Longitudinal-Type Leaky SAW by Reverse Proton Exchange(Poster Session)

Abe Masaya , Kakio Shoji

Proceedings of Symposium on Ultrasonic Electronics (32), 227-228, 2011-11-08

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6

Loss Reduction of Longitudinal-Type Leaky SAW by Reverse Proton Exchange [in Japanese]

ABE Masaya , KAKIO Shoji

… 縦型漏洩弾性表面波(Longitudinal-type Leaky SAW: LLSAW)は,バルク縦波に近い位相速度を有しており,SAWデバイスの高周波化に有利な伝搬モードの一つであるが,伝搬減衰が非常に大きい.本報告では,LLSAWの伝搬減衰を低減させるため,弾性定数が低減した基板とバルクLN層を組み合わせた基板構造を提案する.LLSAWに対して大きな結合係数K^2をもつX-36°Y LiNbO_3 (LN)に提案構造を適用すると,短絡表 …

IEICE technical report. Ultrasonics 111(272), 35-39, 2011-10-24

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7

Evaluation of Acoustic Properties of Amorphous Ta_2O_5 Thin Film Prepared by RF Sputtering [in Japanese]

KAKIO Shoji , HOSAKA Keiko , ARAKAWA Mototaka , OHASHI Yuji , KUSHIBIKI Jun-ichi

… リング装置により成膜したアモルファスTa_2O_5薄膜の基礎的な音響特性を,すだれ状電極による弾性表面波(SAW)伝搬特性と,直線集束ビーム超音波材料解析(LFB-UMC)システムによる漏洩弾性表面波(LSAW)伝搬特性により評価した.128°YX-LiNbO_3上のレイリー型SAWと,36°YX-LiTaO_3上の横波型SAWの位相速度を用いて,アモルファスTa_2O_5薄膜の弾性定数の成膜条件依存性を検討した結果,ターゲット径が …

IEICE technical report. Ultrasonics 111(215), 59-64, 2011-09-19

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8

AS-2-11 Propagation Properties of Longitudinal-Type Leaky SAW on Reverse-Proton-Exchanged LiNbO_3 [in Japanese]

Kakio Shoji , Abe Masaya , Shimizu Hidenori

Proceedings of the IEICE General Conference 2011年_基礎・境界, "S-37"-"S-38", 2011-02-28

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9

1Pb-36 Pressure Characteristics of Leaky Loss and Velocity on Ball SAW Device(Poster Session)

Yanagisawa Takayuki , Akao Shingo , Nakaso Noritaka , Tsuji Toshihiro , Elmazria Omar , Yamanaka Kazushi

Proceedings of Symposium on Ultrasonic Electronics (31), 213-214, 2010-12-06

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10

Tunable Filters Using Ultrawide-Band Surface Acoustic Wave Resonator Composed of Grooved Cu Electrode on LiNbO3

Kadota Michio , Kimura Tetsuya , Ida Yasuyuki

… A leaky surface acoustic wave (LSAW) with a leaky component on a 0–15°YX-LiNbO3 substrate has a large electromechanical coupling factor. … In order to change the LSAW to a Love wave without a leaky component, a high-density electrode with a low velocity such as a Au or Cu electrode is composed on the substrate. … A SAW resonator with a Cu-electrode/15°YX-LiNbO3 structure has been reported to have a wide bandwidth of 12%. …

Jpn J Appl Phys 49(7), 07HD26-07HD26-4, 2010-07-25

The Japan Society of Applied Physics
11

Preparation of magnetostrictive films and development of SAW devices [in Japanese]

YAMAGUCHI Masatsune

… 筆者が学生時代に行ったフェライト膜の作製とそのVHF帯電気音響変換子への応用に始まり,磁歪物質上を伝搬する弾性表面波(SAW)に関する基礎実験等を経て,その後,長期間に亙って携わったSAWデバイスに関する研究の一部を紹介し,その時々の経緯について述べる。 …

IEICE technical report. Ultrasonics 109(425), 43-48, 2010-02-17

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12

3P3-11 Theoretical Analysis of Leaky SAW Properties on Reverse-Proton-Exchanged Substrate(Poster Session)

Shimizu Hidenori , Kakio Shoji , Nakagawa Yasuhiko

Symposium on ultrasonic electronics (30), 497-498, 2009-11-18

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13

Improvement of Shape Factor and Loss of Surface Acoustic Wave Resonator Filter Composed of SiO2/High-Density-Electrode/LiTaO3

Murata Takaki , Kadota Michio , Nakao Takeshi , Matsuda Kenji , Hashimoto Ken-ya

… Thus, the SAW substrates for their RF filters also require an excellent temperature coefficient of frequency (TCF) and an optimum electromechanical coupling factor. … The authors reported an RF SAW filter for MediaFLOTM using a shear horizontal (SH) leaky SAW (LSAW) on a flattened SiO2 film/high-density metal electrode/36–48°Y$\cdot$X-LiTaO3 substrate. …

Jpn J Appl Phys 48(7), 07GG05-07GG05-4, 2009-07-25

The Japan Society of Applied Physics
14

SAW Streaming : Liquid streaming, jetting, atomizing and heating [in Japanese]

SHIOKAWA Showko , KONDOH Jun

… Rayleighタイプの弾性表面波(R-SAW)伝搬面上に水を負荷すると水が流動、飛翔、霧化することを見出した.これをSAWストリーミングと呼び、この現象の実験的・理論的解明および応用について研究を行ってきた.また、SAWストリーミングを用いて液滴振動、非線型振動及び局所発熱効果などの研究も行ってきた.本稿では、SAWストリーミング研究開始から20年を …

IEICE technical report. Ultrasonics 108(320), 29-34, 2008-11-20

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15

1P5-8 Leaky-SAW Properties on Reverse-Proton-Exchanged LiNbO_3(Poster Session)

Shimizu Hidenori , Kakio Shoji , Nakagawa Yasuhiko

Proceedings of Symposium on Ultrasonic Electronics (29), 143-144, 2008-11-11

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16

Propagation Characteristics of Leaky Surface Acoustic Wave on Reverse-Proton-Exchanged LiNbO_3 [in Japanese]

KAKIO Shoji , SHIMIZU Hidenori , NAKAGAWA Yasuhiko

… 性定数が低減したプロトン交換層を基板内部に埋め込むことができるため,バルクと同等の特性をもつ表層の逆プロトン交換層で結合係数の低減を防ぎ,埋め込んだプロトン交換層で漏洩弾性表面波(Leaky SAW: LSAW)の伝搬減衰を抑圧させる基板構造が期待できる.本報告では,まず,回転YカットLiNbO_3(LN)に対して「空気/バルクLN層/弾性定数が低減したLN基板」の3層構造を仮定しLSAW特性を計算した.短絡表面で …

IEICE technical report. Ultrasonics 108(73), 5-10, 2008-05-23

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17

Analysis of Ball Surface Acoustic Wave Sensor Response to Wide Variety of Gases Using Gas Chromatography

Iwata Naoya , Abe Takuji , Tsuji Toshihiro , Mihara Tsuyoshi , Akao Shingo , Yamanaka Kazushi

… Thus, we propose a new approach to measure gases using a ball surface acoustic wave (SAW) sensor, after separating them using gas separation columns. … Also, an amplitude response reflecting the leaky loss of SAW was observed and an approximate equation of leaky loss was derived to quantitatively evaluate the roles of leaky loss and other parameters observed in the ball SAW sensor. …

Jpn J Appl Phys 46(7B), 4532-4536, 2007-07-30

The Japan Society of Applied Physics Cited by (4)
18

Numerical Analysis of Ultrasonic Beam of Variable-Line-Focus-Beam Film Transducer

Aoyagi Takahiro , Nakazawa Marie , Nakamura Kentaro , Ueha Sadayuki

… The interference ripple caused by a leaky surface acoustic wave (SAW) was observed in the lens width vs received intensity curve. … As in the conventional $\mathrm{V}(\mathrm{z})$ curve, the ripple changed according to the attenuation parameter $\alpha$ and the leaky SAW velocity. … Unlike for the conventional true-circle-arc-lens, the ripples caused by the leaky SAWs are observed at both sides of the focal point. …

Jpn J Appl Phys 46(7B), 4486-4489, 2007-07-30

The Japan Society of Applied Physics Cited by (1)
19

Evaluation of Rolling Fatigue Damage in Deep Groove Ball Bearings by Divided-Type Focusing Ultrasonic Transducer

MURATA Yorinobu , TODA Hiroki , TAWA Chiaki , KIJI Masahiro , OGUMA Noriyasu

Materials Transactions 48(6), 1254-1259, 2007-06-01

References (15) Cited by (1)
20

K-5 Analysis of ball SAW sensor response to a wide variety of gases using gas chromatography [in Japanese]

Iwata Naoya , Abe Takuji , Tsuji Toshihiro , Mihara Tsuyoshi , Akao Shingo , Yamanaka Kazushi

… Thus, we propose a new approach to separate the gases using separation column and monitor them by a ball SAW sensor. … Amplitude response reflecting the leaky loss of SAW was observed with hydrogen-nitrogen mixed gas. … Approximate equation of leak loss nearly agreed with experimental results, suggesting a possibility of quantitative analysis using the leaky loss. …

Proceedings of Symposium on Ultrasonic Electronics (27), 367-368, 2006-11-15

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Search Results:　 1-20 of 128