Intelligent design method of microwave broadband supersurface absorber
An intelligent design and absorber technology, applied in design optimization/simulation, instrumentation, computer material science, etc., can solve the problems that limit the development and application of microwave absorbers, consume a lot of time, etc., and achieve low cost, fast time response, and accuracy high rate effect
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[0025] In this embodiment, a 3-layer microwave absorber structure is designed to verify the effectiveness of the intelligent design method. image 3 A schematic diagram of the structure is given; different broadband absorption can be achieved in the range of 0.1-18GHz by designing the thickness and width of polymethacrylimide (PMI) foam and the width of the metal ring.
[0026] First, the structure is simulated in the microwave band 0.1-18GHz, and the incident direction of the incident wave is normal incidence. The reflection coefficient of the structure under normal incidence was obtained by the electromagnetic simulation software CST, as Figure 4 shown.
[0027] Because of the lack of a transmission spectrum, the absorbance is calculated using the following formula:
[0028] Absorption = A = 1-|r| 2 (1)
[0029] where r represents the reflection coefficient.
[0030] In order to characterize the practicability of this method, the relative spectral error is defined as ...
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