仿真天线时HFSS应该使用什么端口激励，求解方式

最近在看60GHz的论文，对其中一个比较感兴趣想自己仿真下，由于之前没用过HFSS，仿真过程中遇到不少疑问。
First question：solution type 的选择
我的见解：从HFSS的帮助文件中可以查看到，HFSS官方对三种SOLUTION TYPE 的解释如下
Driven Modal Solution
Choose the Driven Modal solution type when you want HFSS to calculate the modal-based S-parameters of passive, high-frequency structures such as microstrips, waveguides, and transmission lines. The S-matrix solutions will be expressed in terms of the incident and reflected powers of waveguide modes.
Driven Terminal Solution
Choose the Driven Terminal solution type when you want HFSS to calculate the terminal-based S-parameters of multi-conductor transmission line ports. The S-matrix solutions will be expressed in terms of terminal voltages and currents.
Eigenmode Solution
Choose the Eigenmode solution type to calculate the eigenmodes, or resonances, of a structure. The Eigenmode solver finds the resonant frequencies of the structure and the fields at those resonant frequencies.
所以我个人认为对于天线这种能量的转化结构，尤其是微带天线而言，s参数是以能量的形式表达的，所以应该用模式驱动（Modal solution）
Second Question：应该选用什么样的端口激励，包括波端口，集总端口等等
我的见解：个人虽然看了对这两种端口的解释，对于他们的区别还是不太清楚，只是知道HFSS的help中提到对于微带结构要用集总端口激励。
还想请教各位大侠对于波端口和集总端口的理解，欢迎指正。