Liquid crystal phase shifter, phase shift circuit, and antenna

A phase shift circuit, comprising a liquid crystal phase shifter and a signal processor,

• wherein the liquid crystal phase shifter comprises:
• a first substrate;
• a second substrate, provided opposite to the first substrate;
• a liquid crystal layer, provided between the first substrate and the second substrate;
• and
• a phase shift region, comprising a first electrode, a second electrode and a control circuit, wherein the first electrode is provided on a side of the first substrate close to the second substrate, the second electrode is provided on a side of the second substrate close to the first substrate, an orthographic projection of the second electrode on the first substrate partially overlaps with an orthographic projection of the first electrode on the first substrate, and the second electrode is grounded;
• wherein the control circuit is provided between the first electrode and the second electrode, and the control circuit comprises a transistor layer and a thermoelectric converter;
• the transistor layer is provided on a side of the first substrate, and the transistor layer comprises a first transistor;
• the thermoelectric converter is provided on a side of the transistor layer away from the first substrate, one side of the thermoelectric converter is connected to a source of the first transistor through a via, and another side of the thermoelectric converter is provided adjacent to the liquid crystal layer;
• and
• wherein a drain of the first transistor is connected to an input end of the signal processing module, an output end of the signal processing module is connected to the first electrode, and the signal processing module is configured to output an electrical driving signal based on a first electrical signal.

An antenna, comprising a phase shift circuit, wherein the phase shift circuit comprises a liquid crystal phase shifter and a signal processor,

• wherein the liquid crystal phase shifter comprises:
• a first substrate;
• a second substrate, provided opposite to the first substrate;
• a liquid crystal layer, provided between the first substrate and the second substrate;
• and
• a phase shift region, comprising a first electrode, a second electrode and a control circuit, wherein the first electrode is provided on a side of the first substrate close to the second substrate, the second electrode is provided on a side of the second substrate close to the first substrate, an orthographic projection of the second electrode on the first substrate partially overlaps with an orthographic projection of the first electrode on the first substrate, and the second electrode is grounded;
• wherein the control circuit is provided between the first electrode and the second electrode, and the control circuit comprises a transistor layer and a thermoelectric converter;
• the transistor layer is provided on a side of the first substrate, and the transistor layer comprises a first transistor;
• the thermoelectric converter is provided on a side of the transistor layer away from the first substrate, one side of the thermoelectric converter is connected to a source of the first transistor through a via, and another side of the thermoelectric converter is provided adjacent to the liquid crystal layer;
• and
• wherein a drain of the first transistor is connected to an input end of the signal processing module, an output end of the signal processing module is connected to the first electrode, and the signal processing module is configured to output an electrical driving signal based on a first electrical signal.