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Abstract

A phase shifter includes first and second dielectric substrates opposite to each other and a plurality of phase shift units between the first and the second dielectric substrates; the phase shift unit includes first and second electrode layers and an adjustable dielectric layer between the first and the second electrode layers; orthographic projections of the first and second electrode layers on the first dielectric substrate at least partially overlap each other, and at least one accommodation cell of the phase shift unit is defined in a region where the orthographic projections of the first and second electrode layers on the first dielectric substrate overlap each other; the adjustable dielectric layer is in at least the accommodation cell; and cell gaps of the accommodation cells of at least a part of the plurality of phase shift units are different from each other.

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