$Pb0.3Sr0.7TiO3$ thin films for high-frequency phase shifter applications Available to Purchase

$Pb0.3Sr0.7TiO3(PST30)$ thin films were synthesized on platinized silicon $(Pt∕Si)$ and lanthanum aluminate $(LAO)$ substrates using chemical solution deposition technique. The films on $LAO$ substrate were highly $(100)$ oriented, whereas the films on $Pt∕Si$ substrate were polycrystalline. The low dielectric loss in the $PST30∕LAO$ films makes them attractive for fabricating tunable dielectric devices. An eight-element coupled microstrip phase shifter was fabricated on $PST30∕LAO$ film and tested in the frequency range $∼15–17GHz$⁠. The maximum figure of merit (⁠$κ=$phase shift per $dB$ loss) of $∼56°∕dB$ was obtained for $PST30$ film, which was better than commonly observed value in pure barium strontium titanate films. This makes $PST30$ a potential candidate material for further investigations for microwave applications.