Tunable BaSrTiO3 applications for the RF front end

Summary form only given, as follows. This article presents the design and performance of tunable components and circuits for mobile device antennas based on the company´s barium strontium titanate (BST) thin film technology. A novel capacitor array has been designed utilizing a nonlinear C-V model and a capacitor “stacking” technique. Measurements on mobile devices demonstrate extended bandwidth coverage for LTE, cellular, and PCS bands while maintaining TRP and TIS, and in some cases improvement over fixed solutions.