Structural design and electrical performance simulation calculation of microwave absorption coatings

Since the application of electromagnetic technology，the investigation of microwave absorbing materials has been widespread concerned in the world. With the development of technology，the effect of microwave absorption technology is constantly increasing in the world. Up to now，the structural design and electrical performance simulation calculation of microwave absorption coatings play an increasingly important role in the preparation of microwave absorption coatings. The design and optimization of coating structure can directly improve the absorption performance. Nowadays，microwave absorbing materials usually have multi-layer structures such as impedance matching layer，absorption layer and bonding layer. Their reflection coefficients are determined by the thickness，magnetic permeability，and dielectric constant. Only relying on the experiments to study the influence of reflection coefficient must be inevitably resulted in a relatively broad and blind workload. Based on this， three kinds of microwave absorption coating absorbers were selected to carry out electromagnetic parameter testing and analysis. The electromagnetic properties of single layer，single layer and double layer structure combined with two kinds of absorbers were simulated and calculated under the 1.2 mm thickness of the coating. Four optimal coating design schemes were obtained through the simulation calculation，and the electrical performance experiment were further completed for comparison. The results show that the electrical performance verified by experiment is in good agreement with the trend of simulation calculation results. Finally，the optimal coating is the single-layer coating with the Absorbent A∶ Absorbent C=2∶1. At this time，the simulation calculation and experimental results of the microwave absorption coating both show relatively high absorption performance.