On the Impedance of a Lossy Transducer
Abstract
Many transducer materials exhibit negligible dielectric losses and are represented by models or equivalent circuits containing only mechanical loss mechanisms. In contrast however, polymer hydrophone materials are known to exhibit appreciable dielectric losses at high frequencies. In order to elucidate the effects of dielectric losses, a simple equivalent circuit containing a lossy clamped capacitance is analyzed. Plots of the electrical input impedance are presented for various electrical and mechanical quality factors and for various values of the coupling coefficient. A method for determining the frequencies of maximum and minimum impedance is derived.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 22, 1985
- Accession Number
- ADA630521
Entities
People
- Mark B. Moffett
Organizations
- Naval Underwater Systems Center