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本文对电磁功率通过狭缝进入内部置有导线的矩形导电腔的耦合问题作了初步研究。用等效定理将问题分作两部份。按有关边界条件得出关于狭缝上等效磁流和导线上电流的联立方程组,用矩量法将其转化为矩阵方程组,利用狭缝和细线近似简化了计算。从典型的数值计算结果中可以看到,在某些入射波频率下,存在着关于磁流、电流和腔内场的谐振现象。
In this paper, the coupling of electromagnetic power into the rectangular conductive cavity with wires inside through the slit has been studied. Use the equivalence theorem to divide the problem into two parts. According to the relevant boundary conditions, the simultaneous equations for the equivalent magnetic current in the slit and the current in the conductor are obtained, which are transformed into the matrix equations by the moment method, and the calculation is simplified by using the slit and thin line approximation. From the typical numerical results, we can see that at some incident wave frequencies, there is a resonance phenomenon about the magnetic current, the current and the intracavity field.