Filtering

Abstract

The invention discloses a filter structure for responding to incident, outgoing or transmitted electromagnetic waves. Wherein, the filter structure includes: a physical material layer, wherein a plurality of conductive geometric structures are arranged inside or on the surface of the physical material layer; a switching element is connected between the first structure and the second structure in the plurality of conductive geometric structures, And / or, connected between the first end and the second end of the third structure among the plurality of conductive geometric structures; wherein, when the electromagnetic wave is in the first state, the switching element is turned off, and when the electromagnetic wave is in the second state state, the switching element is turned on. The invention solves the technical problem that it is difficult to make different responses to electromagnetic waves in different states in a preset manner due to the fixed structure of the existing filter material.

Description

technical field [0001] The present invention relates to the communication field, in particular to a filtering structure. Background technique [0002] In the actual application of satellite antennas, the polarization of the transmitted or received satellite signals is not fixed, that is to say, the conductive geometric structure of the metamaterial must be able to respond to various polarization conditions. In practical engineering, it is usually adopted to add a control degree of freedom to make the metamaterial antenna surface rotate in the plane with its normal direction as the axis of rotation, so that the polarization direction of the designed conductive geometric structure can be adjusted under any circumstances. , corresponding to the polarization direction of the satellite signal. [0003] However, adding a degree of freedom to the servo system where the antenna surface and the feed source are installed will inevitably require a certain price. For example, the compl...

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