Hybrid algorithm for slot coupling of double layer shielding cavity

A hybrid method for shielding efficiency or coupling efficiency estimation of slot in double-layer shielding cavity is presented. The coupling efficiency of outer slot is calculated by the transmission line model and the coupling efficiency of inner slot is based on the coupling theory of small holes and its equivalent model of magnetic dipole, which is excited by magnetic current. The distribution of electric field and the rule of shielding efficiency in inner cavity is obtained by the hybrid method. The validity is given by the well matched of trasmission line model, magnetic dipole, Micro-Stripes software simulated data and measured data. The result of the hybrid method exhibit the relationship between the slot position, slot number and the shielding efficiency of different watching poi