CST MWS仿真方向图每调整一次频率点都要重新仿真一次，这也太麻烦了吧。

OK。学习了，谢谢f1381584904童鞋
根据Help文件 Solve——>Monitors，Broadband Farfield Monitor即为小编所需的。其采用球面波展开的方法计算远场，Accuracy决定了其球面波展开式的阶数，而Freq。Sample决定了瞬态求解远场采样点的数量，其余频点远场将通过内插得到
Broadband: If a farfield monitor was selected in the type frame a broadband farfield can be calculated during the transient solver run. The broadband farfield monitor is based on an expansion of the farfield in terms of spherical waves. The origin of the expansion is the center of the bounding box. It allows to obtain the farfield at any frequency in the specified range as well as at any time of the simulation. Frequency domain and time domain results can be accessed by selecting plots of a broadband farfield monitor and by the plot properties dialog.
Freq. samples: Choose a number of equidistant frequency samples between Fmin and Fmax where frequency domain farfields are calculated. Results for any frequencies in between are interpolated to obtain broadband information. For a more accurate interpolation over the frequency band increase this value e.g. to "31". An odd number assures that the result at mid frequency is not obtained by interpolation.
Accuracy: Defines the desired accuracy of the farfield. Together with the Fmax and the size of the structure it determines the number of modes required to represent the farfield.
Note that leaving out higher order terms by choosing a lower accuracy is equivalent to low pass filtering the farfield solution. This saves memory and computation time. However, the farfield result has usually less detail.
Transient farfields: This check button activates the additional calculation of transient farfield information which can be displayed afterwards for a certain time in the post processing. Note that in order to accurately obtain time domain farfields the computational effort is higher than for broadband farfields only.

刚开始为了节省时间，设置的频点少。后来想增加频点，只能重新仿真了。谢谢各位。