Flexible Structural Design and Electromagnetic Simulation of Microwave Leakage Suppressor for Asphalt Pavement

doi:10.3969/j.issn.1674-358X.2011.04.014

Abstract：In order to study the anti-microwave leakage when recycled asphalt pavement is subjected to microwave heating,a flexible structure of the leakage suppressor was designed and applied to the development of microwave engineering vehicle maintenance.Based on the waveguide transmission line theory,a model of microwave leakage suppression was established,and two kinds of microwave leakage suppressor that modular plate and metal wire mesh were researched and designed and the equivalent circuits of two suppressors were received.The attenuation model of metal comb plate was set up,and the relationship models between wire-to-wire spacing of the metal mesh or multi-layer wire mesh interconnection distance and shielding effectiveness were built respectively,and the shielding effectiveness of them was calculated.The results show that,combined plate-type for microwave leakage suppressor,when comb-shaped plate distance is 12 mm,height of comb-shaped plate is 30.5 mm,it can achieve better shielding effectiveness.In the other hand,for microwave leakage of metal wire mesh-type suppressor,when using 4-layer metal mesh and the gateway from the last,the theoretical value in the shielding effectiveness of 90 dB or more,a good inhibitory effect is get.Through the analysis and comparison with suppressor of two microwave leakage,wire mesh-type microwave leakage suppressor can adaptive the shape of surface disease,and prevent electromagnetic radiation,can be applied in practical engineering.