Title :
Tunable Stub Resonators on KTN Ferroelectric Thin Films
Author :
Mousavou, A.-G. ; Legeay, G. ; Sauleau, Ronan ; Deputier, Stephanie ; Castel, Xavier ; Perrin, A. ; Benzerga, Ratiba ; Guilloux-Viry, Maryline ; Mahdjoubi, Kourosh
Author_Institution :
IETR, Univ. de Rennes, Rennes
Abstract :
In this paper, we report on the agility of CPW stub resonators operating in X-band and printed on ferroelectric thin films. The ferroelectric material selected here is KTa0.5Nb0.5O3 (KTN). The thin films were grown by pulsed laser deposition. X-ray characterizations revealed an epitaxial growth on MgO substrates, while films deposited on sapphire were textured. Numerical simulations have evidenced a 10% tunability under low external DC bias voltage. Measurements have demonstrated a tunability reaching 5% for KTN/Sapphire and 1% for KTN/MgO. They have also shown that the insertion loss on MgO is acceptable (~2.1 dB/cm at 10 GHz).
Keywords :
cavity resonators; coplanar waveguide components; ferroelectric thin films; niobium compounds; potassium compounds; pulsed laser deposition; tantalum compounds; CPW stub resonators; KTN ferroelectric thin films; KTaNbO; MgO; X-band; low external DC bias voltage; pulsed laser deposition; sapphire; tunable stub resonators; Ferroelectric material; KTa1-xNbxO3 thin film; resonators; tunability;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Print_ISBN :
978-0-86341-842-6
