Voltage tunable reflective coplanar phase shifters
View Patent ↗A phase shifter includes a substrate, a tunable dielectric film having a dielectric constant between 70 to 600, a tuning range of 20 to 60%, and a loss tangent between 0.008 to 0.03 at K and Ka bands 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, and a connection for applying a control voltage to the tunable dielectric film. A reflective termination coplanar waveguide phase shifter including a substrate, a tunable dielectric film having a dielectric constant between 70 to 600, a tuning range of 20 to 60%, and a loss tangent between 0.008 to 0.03 at K and Ka bands positioned on a surface of the substrate, first and second open ended coplanar waveguides positioned on a surface of the tunable dielectric film opposite the substrate, microstrip line for coupling a radio frequency signal to and from the first and second coplanar waveguides, and a connection for applying a control voltage to the tunable dielectric film.
1. A method of manufacturing a reflective termination coplanar waveguide phase shifter comprising:
providing a substrate;
positioning a tunable dielectric film on a surface of the substrate;
positioning first and second open ended coplanar waveguide lines on a surface of the tunable dielectric film opposite the substrate wherein said first and second coplanar waveguide lines have different impedances;
positioning a microstrip line on the substrate for coupling a radio frequency signal to and from the first and second coplanar waveguide lines; and
placing a connection for applying a control voltage to the tunable dielectric film.
2. A reflective termination coplanar waveguide phase shifter comprising:
a substrate;
a tunable dielectric film positioned on a surface of the substrate;
first and second open ended coplanar waveguide lines positioned on a surface of the tunable dielectric film opposite the substrate, wherein said first and second coplanar waveguide lines have different impedances;
microstrip a line positioned on the substrate for coupling a radio frequency signal to and from the first and second coplanar waveguide lines; and
a connection for applying a control voltage to the tunable dielectric film.
3. A reflective termination coplanar waveguide phase shifter according to claim 2 , further comprising:
microstrip a divider coupling said microstrip line to said first and second coplanar waveguide lines.
4. A reflective termination coplanar waveguide phase shifter according to claim 2 , wherein said tunable dielectric film comprises a barium strontium titanate composite.
5. A method of phase shifting, comprising:
using a reflective termination coplanar waveguide phase shifter to shift the phase of a signal, said phase shifter comprising:
a substrate;
a tunable dielectric film positioned on a surface of the substrate;
first and second open ended coplanar waveguide lines positioned on a surface of the tunable dielectric film opposite the substrate, wherein said first and second coplanar waveguide lines have different impedances;
microstrip a line positioned on the substrate for coupling a radio frequency signal to and from the first and second coplanar waveguide lines; and
a connection for applying a control voltage to the tunable dielectric film.
6. The method of claim 5 , further comprising:
coupling said microstrip line to said first and second coplanar waveguide lines with a microstrip divider.
7. A reflective termination coplanar waveguide phase shifter comprising:
a substrate;
a tunable dielectric film positioned on a surface of the substrate, wherein the tunable dielectric film has a dielectric constant of greater than 300;
first and second open ended coplanar waveguide lines positioned on a surface of the tunable dielectric film opposite the substrate;
microstrip a line positioned on the substrate for coupling a radio frequency signal to and from the first and second coplanar waveguide lines; and
a connection for applying a control voltage to the tunable dielectric film.
8. A method of manufacturing a reflective termination coplanar waveguide phase shifter comprising:
providing a substrate of MgO or LaAlO 3;
positioning a Unable dielectric film on a surface of the substrate, wherein said tunable dielectric film has a dielectric constant of greater than 300;
positioning first and second open ended coplanar waveguide lines on a surface of the tunable dielectric film opposite the substrate wherein said first and second coplanar waveguide lines have different impedances;
positioning a microstrip line on the substrate for coupling a radio frequency signal to and from the first and second coplanar waveguide lines; and
placing a connection for applying a control voltage to the tunable dielectric film.