An Ultrathin Flexible Composite Broadband Microwave Absorbing Structure

Abstract

The invention discloses an ultrathin and flexible composite wideband microwave absorption structure. The ultrathin and flexible composite wideband microwave absorption structure comprises an impedance matching structure, a frequency selection surface structure, a medium bearing structure, an energy loss structure and a metal backboard which are sequentially stacked from top to bottom, wherein the frequency selection surface structure is in direct contact with the medium bearing structure, the impedance matching structure is bonded with the frequency selection surface structure by an adhesive film, the medium bearing structure is bonded with the energy loss structure by an adhesive film, the energy loss structure is bonded with the metal backboard by an adhesive film, the impedance matching structure and the energy loss structure are respectively made of magnetic medium materials with different electromagnetic properties, and the frequency selection surface structure comprises a plurality of metal patch units arranged periodically. The microwave absorption structure provided by the invention is simple in preparation process, is flexible in texture, ultrathin in thickness and wide in microwave absorption frequency band, and has excellent polarization stability and oblique incidence angle stability.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing structures, and more specifically relates to an ultra-thin flexible composite broadband microwave absorbing structure and a preparation method thereof. Background technique [0002] With the widespread popularization of wireless transmission and high-frequency electronic equipment in our daily life, our daily environment has also become a complex electromagnetic environment, full of electromagnetic waves in various transmission directions and polarization directions, making the problem of electromagnetic compatibility increasingly obvious. Important, microwave absorbing structures have therefore received a lot of attention. As the size of electronic devices tends to be miniaturized and their operating frequency bands become wider and wider, there is a very practical demand for microwave absorbing structures that have the characteristics of thin thickness and wide absorption frequency b...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above defects or improvement needs of the prior art, the present invention provides an ultra-thin composite broadband microwave absorbing structure and its preparation method, the purpose of which is to place magnetic medium materials with different electromagnetic properties on the The top and bottom realize the broadband microwave absorption characteristics, thereby solving the technical problems of complex preparation process and thick thickness of the broadband microwave absorption structure with the impedance type frequency selective surface as the main structure

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