Phase shifter and antenna

A phase shifter, comprising:

• a base substrate,
• a signal electrode, a first reference electrode, and a second reference electrode all on the base substrate, and the first reference electrode and the second reference electrode being respectively on two sides of a length direction of the signal electrode;
• an interlayer insulating layer on a side of the signal electrode away from the base substrate;
• and
• at least one phase control unit each comprising a film bridge on a side of the interlayer insulating layer away from the base substrate;
• at least part of the signal electrode being in space enclosed by the base substrate and the film bridge, and orthogonal projections of two ends of the film bridge on the base substrate respectively overlapping with orthogonal projections of the first reference electrode and the second reference electrode on the base substrate;
• wherein
• the film bridge comprises a first anchor point area, a second anchor point area, and a functional area between the first anchor point area and the second anchor point area;
• and the film bridge has a hollow pattern in the functional area.