Some Improvements in Quartz Crystal Circuit Elements

H E R E are at the present time two types of crystal quartz plates in general use as circuit elements for frequency stabilization at radio frequencies, namely, the X-cut and F-cut. 1 This paper is concerned with the improved characteristics of plates having radically new orientations. In its usual form the F-cut plate is cut from the mother crystal, as shown in Fig. 1. The electric field is applied along the F direction OPTIC AXIS MECHANICAL AXIS Fig. 1--Showing relation of Y-cut quartz crystal to the crystallographic axes.