PURPOSE: To attain the suppression of spurious radiation, the improvement of Q and the miniaturization by specifying the size of a vibrating element plate to a prescribed value in a strip piezoelectric vibrator using LiTaO3 as the vibrating element plate.
CONSTITUTION: The vibrating element plate 1 is made of LiTaO3 and an electrode 2 and a terminal electrode 3 are formed on the front and rear sides to constitute the strip piezoelectric vibrator. The vibrating element plate 1 is cut so that the lengthwise direction is within a range of 48°±4° clockwise from the Y axis of crystal. The dimension is selected as L/H=9.5∼14 and W/H≤1.2, where H is the thickness of the vibrating element plate 1, L is the length and W is the width. As a result, the spurious radiation is suppressed, the Q is improved and also the vibrator is miniaturized.
YAMADA SUMIO
KOJIMA YUUJI
HOSHINO HIROSHI
| JPS5683110A | 1981-07-07 | |||
| JPS5185688A | 1976-07-27 |