Re: stripline excitation
The procedure depeds on your specific application. In general, the outer conductor is soldered to the ground plane, and the inner one is extended through a via an specific length (indirect coupling) or all the way to be soldered to the strip conductor (direct coupling). But the loacation of the contact point with strip in direct coupling or the length extension of inner conductor in indirect coupling and many other parameters influence the performance of your design and thus must be optimized accordingly.
If you be more specific about your problem, the disscusion can be more Concise and helpfull.