Piezoelectric Voltage Coupled Reentrant Cavity Resonator

TL;DR

This paper presents a novel piezoelectric voltage coupled reentrant cavity resonator that enables voltage-controlled tuning, mechanical mode excitation, and material sensitivity measurement, verified through experiments and simulations at various temperatures.

Contribution

It introduces a new design of a piezoelectric coupled reentrant cavity resonator with multiple functionalities including voltage tuning and mode measurement.

Findings

Successful implementation of voltage tunability at room and cryogenic temperatures

Verification of results using Finite Element software

Demonstration of the cavity as a sensitive transducer

Abstract

A piezoelectric voltage coupled microwave reentrant cavity has been developed. The central cavity post is bonded to a piezoelectric actuator allowing the voltage control of small post displacements over a high dynamic range. We show that such a cavity can be implemented as a voltage tunable resonator, a transducer for exciting and measuring mechanical modes of the structure and a transducer for measuring comparative sensitivity of the piezoelectric material. Experiments were conducted at room and cryogenic temperatures with results verified using Finite Element software.