Micro-electromechanical system switch and communication device

A micro-electromechanical system switch, comprising:

• a substrate;
• a direct current (DC) bias line, arranged on one side of the substrate;
• a first signal transmission line and a second signal transmission line, arranged on a same side of the substrate as the DC bias line, wherein the first signal transmission line and the second signal transmission line are spaced side-by-side from the DC bias line, and the first signal transmission line and the second signal transmission line are arranged on two sides of the DC bias line;
• a cantilever beam, arranged on a side, away from the substrate, of a layer on which the first signal transmission line is located;
• wherein the cantilever beam spans the DC bias line and a gap is provided between the cantilever beam and the DC bias line in a direction perpendicular to the substrate;
• the cantilever beam comprises a fixed end and a free end;
• the fixed end is connected to the second signal transmission line;
• an orthographic projection of the free end on the substrate is within an orthographic projection of the first signal transmission line on the substrate;
• and in the direction perpendicular to the substrate, a gap is provided between the free end and the first signal transmission line;
• and
• a fixing structure, arranged on the side, away from the substrate, of the layer on which the first signal transmission line is located and not in contact with the first signal transmission line, wherein the fixing structure connects the free end and the substrate.