At present, the common numerical methods are finite difference, finite element, boundary element, integration equation and transmissionlinemethod.
目前，解决这类问题的数值方法主要有有限差分法、有限元法、边界元法、积分方程法、传输线法等。
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Secondly, Using MATLAB and HFSS to deeply research three types of analytical method for microstrip antenna which are transmissionlinemethod, cavity mode theory and finite-element method.
Based on the frequency parameters, a new transformation method to determine the response to lightning impulse wave on transmissionline with corona is proposed in this paper.