RESEARCH INTO NEW APPROACHES FOR VHF FILTER CRYSTALS.
Abstract
Energy trapping theory has been applied to obtain a normalized expression relating harmonic overtone modes and the inharmonic overtone series associated with each, for idealized thickness shear and thickness twist modes, to a resonator design parameter which includes both electrode dimension and effective electrode mass-loading. From this, a generalized resonator design criterion is proposed. A major series of experiments with fundamental, 3rd, and 5th overtone resonators at 10, 30, and 50 Mc has been performed to confirm theory and obtain improved values for the generalized resonator design criterion. These principals have been used to obtain substantial improvement in performance for resonators at 10, 30, 60, and 90 Mc in several structural configurations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 05, 1965
- Accession Number
- AD0617187
Entities
People
- D. J. Koneval
- Damian Curran