Title :
Tunable microwave components based on KTaxNb1-xO3 ferroelectric material
Author :
Laur, Vincent ; Rousseau, Anthony ; Tanne, Gerard ; Laurent, Paul ; Huret, Fabrice ; Guilloux-viry, Maryline ; Della, Bernard
Author_Institution :
LEST - UBO/ENSTBr, Brest, France
Abstract :
We made tunable microwave ferroelectric interdigital capacitors (IDCs) and resonators with different KTaxNb1-xO3 (KTN) materials. Measurement results highlighted interesting variations, i.e. about 9.27% at 2 GHz on the capacitance value, at low bias voltage (∼15 kV/cm). This study enabled us to choose KTa0.5Nb0.5O3 among three KTN compositions because, at room temperature, it showed the best properties for achievement of tunable devices. To our knowledge, among the few circuits based on a ferroelectric thin film other than BaxSr1-xTiO3 (BST) material, the ones we proposed demonstrate very promising performances for microwave applications. In the future, KTNs could compete with BSTs for tunable devices.
Keywords :
barium compounds; ferroelectric capacitors; ferroelectric materials; ferroelectric thin films; niobium compounds; potassium compounds; resonators; strontium compounds; tantalum compounds; thin film capacitors; BST material; BaSrTiO3; IDC; KTN compositions; KTN materials; KTa0.5Nb0.5O3; ferroelectric material; ferroelectric thin film; interdigital capacitors; microwave ferroelectric capacitors; tunable microwave components; Binary search trees; Capacitance measurement; Capacitors; Ferroelectric materials; Low voltage; Microwave circuits; Niobium; Temperature; Thin film circuits; Tunable circuits and devices;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1608938
