Face-mounted piezoelectric resonators

This paper presents a new approach to the problem of mounting moderate Q thickness mode piezoelectric resonators based on the impedance transforming properties of quarter-wavelength transmission lines. The resulting sandwich structure has been demonstrated in the range 2-7 Mc/s, and a computer analysis of the tolerance sensitivities of the center frequency and Q has been conducted. This type of resonator appears particularly promising as a tuner for high frequency integrated circuits. The problems which must yet be solved in order to implement these tuners in thin film form are described.