Electrically tunable microwave phase shifter based on layered ferrite-ferroelectric structure

A novel electrically tunable microwave phase shifter is proposed based on surface spin wave propagation in a layered structure containing ferrite and ferroelectric materials. Operating characteristics of the phase shifter are investigated theoretically. It is shown that waveguiding elements from planar layered ferriteferroelectric structures allow the construction of compact devices with high electrical tunability achieving 10 degree /V.