Abstract
We report the latest development in the ferroelectric thick film technology for microwave applications. Thick film screen-printing technology has become increasingly popular due to its low production cost. Here, we report three types of phase shifter, i.e. Coplanar strip transmission line (cps-tl) phase shifter, transmission line with periodically loaded ferroelectric capacitor phase shifter and reflective resonant phase shifter. All the phase shifters are screen-printed using barium strontium titanate (BST) thick film on alumina substrates. The design and experimental results of these phase shifters are presented.