Suppression of Inharmonic Modes Using Elliptical Periphery Electrodes in Very High Frequency Fundamental AT-Cut Resonators
スポンサーリンク
概要
- 論文の詳細を見る
This paper describes suppression of inharmonic modes in a trapped-energy AT-cut resonator operating in a very high frequency (VHF) fundamental mode. This resonator has an elliptical excitation electrode conforming to the anisotropy in the AT-cut quartz plate. Moreover, the new resonator has a mesa to control the plateback and a second electrode with an elliptical opening to decrease the plateback. Resonators operating at 155 MHz are manufactured. In these resonators, the length of the excitation electrode is 53 times the thickness of the crystal substrate. Nevertheless, all of the inharmonic modes can be suppressed by employing the above electrode structure. The ratio of the impedance at the most strongly excited inharmonic mode to the impedance at the main mode in the new resonator is four times that in a conventional resonator with a rectangular excitation electrode.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 2001-05-30
著者
-
Iwata Hirokazu
Central Research Laboratories Toyo Communication Equipment Co. Ltd.
-
Hirama Koichi
New Business Development Division, Toyo Communication Equipment Co., Ltd., 484 Tsukagoshi 3-chome, Saiwai-ku, Kawasaki, Kanagawa 212-8513, Japan
-
Iwata Hirokazu
Central Research Laboratories, Toyo Communication Equipment Co., Ltd., 1-1 Koyato 2-chome, Samukawa-machi, Koza-gun, Kanagawa 253-0192, Japan
関連論文
- Suppression of Inharmonic Modes Using Elliptical Periphery Electrodes in Very High Frequency Fundamental AT-Cut Resonators
- Suppression of Inharmonic Modes Using Elliptical Periphery Electrodes in Very High Frequency Fundamental AT-Cut Resonators