FUNDAMENTAL MODE FILTER CRYSTALS FOURTH QUARTERLY PROGRESS REPORT 21 February 1958 through 21 May 1958 Object of Research Development of Design Data for Fundamental Thickness Shear Filter Crystals

摘要

Representative data on 20 Mc, and 30 Mc, fundarnental and overtone crystals are presented.nCrystals are more free from spurious modes at the fundamental resonance than at the third overtone.