Multi-band tunable broadband wave absorber based on AFSS
A wave absorber, multi-band technology, applied in electrical components, antennas, etc., can solve the problems of difficult to work effectively and difficult to adapt to the electromagnetic environment.
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[0031] The structure of the multi-band tunable broadband absorber based on AFSS in the present invention is as figure 1 As shown, from left to right, it includes a first layer of active frequency selective surface 1 , a first layer of foam layer 2 , a second layer of active frequency selective surface 3 , a second layer of foam layer 4 and a metal back plate layer 5 .
[0032] The schematic diagram of the structure of the first layer of active frequency selective surface of the absorber in this embodiment is as follows figure 2 shown, from figure 2 It can be seen that the active frequency selective surface 1 of the first layer includes a first dielectric layer 11, and a rectangular array composed of first metal units 12 is etched on the first dielectric layer 11, and the rectangular array is an array of 18×18; the first The metal unit 12 is made up of two arrow units in opposite directions. The angle between the head positions of the arrows is 45°. The width of the straight...
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