一种新的高次边缘元方法

讨论了一种新的高次边缘元方法，它不仅消除了伪解，并具有简单高效的特点．着重研究了二次边缘元的空间构造；给出了有关计算公式．对具有精确解的条形介质填充波导主模和高次模本征值的计算表明：二次边缘元方法的计算精度比一次边缘元提高约一个数量级．块状介质填充和衬底各向异性的微带线主模色散曲线的计算证实了该方法的精确性和广泛的适用性．

MA NEW HIGH-ORDER EDGE-ELEMENT APPROACH

A new high order edge element approach is discussed. This method not only elimiflates the spurious solutions but also possesses the characteristics of simplicity and high efficiency. The emphasis is laid on the investigation of the space construction of the second-order edge-element approach and the related formulations are given.The computations of the eigenvalues of the dominant and the higher-order modes in the slab loaded waveguide show that the accuracy of the second-order edge-element approach is about one order higher than that of the first-order edge-element approach.The calculations of the dispersion curves for the dominant mode in the block dielectric loaded rectangular waveguide and in the microstrip line with anisotropic substrate verify the accuracy and the extensive suitability of the present method.