Voltage tunable coplanar waveguide phase shifters

A phase shifter comprising:

• a substrate;
• a tunable dielectric film having a dielectric constant between 70 and 600, a tuning range of 20 to 60%, and a loss tangent between 0.008 and 0.03 at K and Ka bands, the tunable dielectric film being positioned on a surface of the substrate;
• a coplanar waveguide positioned on a surface of the tunable dielectric film opposite the substrate;
• an input for coupling a radio frequency signal to the coplanar waveguide;
• an output for receiving the radio frequency signal from the coplanar waveguide;
• a connection for applying a control voltage to the tunable dielectric film;
• wherein the coplanar waveguide comprises:
• conductive strip;
• a first electrode position adjacent a first side of said conductive strip to define a first gap between the first electrode and the conductive strip;
• a second electrode position adjacent a second side of said conductive strip to define a second gap between the second electrode and the conductive strip;
• a third electrode position adjacent a first side of said first electrode opposite said conductive strip to define a third gap between the first electrode and the third electrode;
• and
• a fourth electrode position adjacent a first side of said second electrode opposite said conductive strip to define a fourth gap between the second electrode and the fourth electrode.