Piezoelectric Voltage Coupled Reentrant Cavity Resonator
  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. 
Natalia C. Carvalho, Yaohui Fan, Jean-Michel Le Floch, Michael Edmund   Tobar
physics.ins-det