Natural Single-Phase Unidirectional Transducer Orientations on Doubly Rotated Y-Cut Langasite Substrates

スポンサーリンク

概要

• 論文の詳細を見る

• Langasite (LGS, La_3Ga_5SiO_<14>) single crystal is an attractive substrate for surface acoustic wave (SAW) devices requiring good temperature stability and high electromechanical coupling constant K^2. However, the SAW reflection characteristics due to the strip electrode on LGS have not been reported so far. This is necessary for designing SAW devices such as single-phase unidirectional transducer (SPUDT)-based filters and resonators with grating reflectors. In recent years, several research groups have shown theoretically and experimentally that the (0°, 140°, 22°-24°) cut on LGS is a very promising cut. This cut is characterized by zero TCD, moderately high K^2, and zero power flow angle. In this paper, we describe the analytical results of SAW reflection characteristics using coupled-mode and perturbation theories. From the analysis of reflection characteristics, we find that the (0°, 140°, 22°-24°) cut has excellent natural single phase unidirectional transducer (NSPUDT) orientations with large directivity as well as zero TCD, high K^2, and zero power flow angle.

• 社団法人応用物理学会の論文
• 1999-05-30

著者

• Takeuchi Masao

  Department of Physical Education, Hoshi University School of Pharmacy and Pharmacological Science

• Takeuchi M

  National Inst. Advanced Industrial Sci. And Technol. (aist) Ibaraki Jpn

• Tanaka Mitsuhiro

  Functional Devices Research Laboratory Ngk Insulators Ltd.

• Sakamoto Terumi

  Department Of Electronic Engineering Tamagawa University

• Takeuchi Masao

  Department Of Electronic Engineering Tamagawa University

• TAKEUCHI Masao

  Department of Electrical and Electronic Engineering, Ibaraki University

関連論文

• Distribution and Neuronal Networks of Novel GPCR Ligands in Feeding Regulation(Tokyo Satellite Symposium "Contribution of Histochemistry in Basic Science and Clinical Medicine")
• Natural Single-Phase Unidirectional Transducer Orientations on Doubly Rotated Y-Cut Langasite Substrates
• A Design of Surface Acoustic Wave Wideband Single-Phase-Unidirectional Transducers Using Coupling-of-Modes Theory

スポンサーリンク