Active dual-band liquid crystal transmissive and reflective array structure

An active dual-band liquid crystal transmissive and reflective array structure, comprising:

• a first substrate layer, having a first upper surface and a first lower surface;
• a second substrate layer, having a second upper surface and a second lower surface;
• a first liquid crystal layer, stacked and connected between the first substrate layer and the second substrate layer;
• a plurality of first surface units, arranged in an array on the first upper surface, wherein each first surface unit has four first surface outer frame patches and a first surface cross-shaped patch, wherein a first surface inner frame patch is disposed inside the first surface outer frame patch;
• a plurality of second surface units, arranged in an array on the first lower surface, wherein each second surface unit has four second surface rectangular patches, wherein the edges of each second surface rectangular patch are connected to four second surface metal wires, and a second surface cross-shaped slot is disposed at the center of the second surface rectangular patch;
• a plurality of third surface units, arranged in an array on the second upper surface, wherein each third surface unit has four third surface rectangular patches, wherein the edges of each third surface rectangular patch is connected to four third surface metal wires, and a third surface square slot is disposed at the center of the third surface rectangular patch;
• and
• a plurality of fourth surface units, arranged in an array on the second lower surface, wherein each fourth surface unit is a fourth surface cross-shaped patch,
• wherein the first surface outer frame patch, the first surface inner frame patch, the first substrate layer, the second surface rectangular patch, the four second surface metal wires connected to the edges of the second surface rectangular patch, the first liquid crystal layer, the second substrate layer, the third surface rectangular patch, the four third surface metal wires connected to the edges of the third surface rectangular patch form a reflective cell unit;
• when the first liquid crystal layer is not biased, the central operating frequency of the reflective cell unit is between 27 GHz and 29 GHz,
• wherein the first surface cross-shaped patch, the first substrate layer, the second surface unit, the first liquid crystal layer, the third surface unit, the second substrate layer, and the fourth surface unit form a transmissive cell unit;
• when the first liquid crystal layer is biased, the central operating frequency of the transmissive cell unit is between 17 GHz and 19 GHz.