size of waveport in patch antenna using hfss

What should be the size of the waveport in a line fed microstrip rectangular patch antenna ?
How do i det the waveport.
i know the question sounds silly but i am new to HFSS so please help.
i use verson 10.1.

my substrate height is 1.5mm and strip width is 1.76mm.

What is the use of the integration line in the waveport.do i need to define it?

thanks is advance.