9LUEBBER R J. Finite conductivity uniform GTD versus knife edge diffraction in prediction of propagation path loss[ J]. IEEE Trans,2005,32( 1 ):70-76.
10RYAN C E Jr, PRTERS L Jr. Evaluation of edge diffraction fields including equivalent current for the caus- tic regions [ J]. IEEE Trans Ant and Prop, 2007,17 : 292 -299.
