Electromagnetic-wave radiation system, and communication device

An electromagnetic wave radiation system, comprising:

• a first metal substrate;
• a second metal substrate, opposite to the first metal substrate;
• an electromagnetic wave transmission component, between the first metal substrate and the second metal substrate;
• wherein the electromagnetic wave transmission component comprises a first glass substrate and a second glass substrate arranged opposite to each other, a liquid crystal layer between the first glass substrate and the second glass substrate, and a plurality of electromagnetic wave transmission structures on a side of that first glass substrate facing the liquid crystal layer;
• the first glass substrate is close to the first metal substrate;
• and
• an electromagnetic shielding structure, between the electromagnetic wave transmission component and the first metal substrate, wherein the electromagnetic shielding structure comprises a plurality of shielding units surrounded by a plurality of first metal pillars, the shielding units are arranged in one-to-one correspondence with the electromagnetic wave transmission structures, and an orthographic projection of the electromagnetic wave transmission structure on the first metal substrate is within a range of an orthographic projection of the shielding unit on the first metal substrate.