National Key Lab. of Science and Technology on Antennas and Microwaves;
Xidian University;
Xi' an 710071;
China;
Institute of China Innovation;
East China Normal University;
Shanghai 200062;
China;
Vector Finite Element Method(FEM); Absorbing Boundary Condition(ABC); Ex-panded Cholesky Method(ECM); MultiFrontal algorithm(MF);