Spatial filter driving method, driving device and spatial filter

The invention provides a driving method and a driving device of a spatial filter, and the spatial filter, and belongs to the technical field of radio frequency. According to the driving method of the spatial filter disclosed by the invention, the spatial filter comprises a first dielectric substrate and a second dielectric substrate which are oppositely arranged, an adjustable dielectric layer arranged between the first dielectric substrate and the second dielectric substrate, and a plurality of first electrodes arranged on one side, close to the adjustable dielectric layer, of the first dielectric substrate, the plurality of second electrodes are arranged on one side, close to the adjustable dielectric layer, of the second dielectric substrate; the first electrodes and the second electrodes are arranged in a crossed manner to define a plurality of resonance units; the driving method comprises the following steps: acquiring the working voltage of the adjustable dielectric layer; according to a to-be-radiated area, a threshold voltage and the working voltage, calculating to obtain a first driving voltage loaded by each first electrode and a second driving voltage loaded by each second electrode; corresponding first driving voltages are loaded to the first electrodes respectively, and corresponding second driving voltages are recorded to the second electrodes respectively, so that electromagnetic waves are radiated in the radiation area.