Phase shifter, manufacturing method thereof and antenna

A method for manufacturing a phase shifter, comprising steps of:

• forming a signal line and reference lines on a first substrate, the reference lines being located on at least one side of an extending direction of the signal line;
• forming a first insulating layer on a side of the signal line distal to the first substrate;
• forming a first transmission structure on a side of the first insulating layer distal to the first substrate, wherein the first transmission structure is electrically connected to the signal line;
• an orthographic projection of the first transmission structure on the first substrate is not overlapped with an orthographic projection of a plurality of electrode film bridges on the first substrate;
• forming the plurality of eletrode film bridges on a side of the first insulating layer distal to the signal line;
• wherein each electrode film bridge comprises a main portion and at least one connection portion;
• an orthographic projection of the main portion on the first substrate at least partially overlaps with the orthographic projection of the signal line on the first substrate, and a gap is formed between the main portion and the first insulating layer;
• the at least one connection portion is connected to the main portion, and an orthographic projection of the connection portion on the first substrate at least partially overlaps with the orthographic projection of the reference lines on the first substrate.