Phase shifter and preparation method thereof, and electronic device

A phase shifter, comprising:

• a first base plate and a second base plate, wherein the first base plate and the second base plate are arranged opposite to each other;
• a first electrode layer, arranged at a side of the first base plate close to the second base plate, and comprising a first electrode, a first control line and a first insulation part, wherein the first electrode and the first control line are electrically connected, and the first insulation part covers the first electrode and the first control line;
• a second electrode layer, arranged at a side of the second base plate close to the first electrode layer, and comprising a second electrode, a second control line and a second insulation part, wherein the second electrode and the second control line are electrically connected, and the second insulation part covers the second electrode and the second control line;
• along a direction perpendicular to the first base plate, the first electrode and the second electrode at least partially overlap to form a first region;
• and
• an adjustable dielectric layer, arranged between the first electrode layer and the second electrode layer, and comprising a first support structure, wherein the first support structure is arranged on at least one side of the first region, and an orthographic projection of the first support structure on the first base plate is at least non-overlapping with an orthographic projection of the first region on the first base plate.