Defining a Voltage source using a Probe

In the following link it has been shown a Ideal voltage source but my doubt is that How to define it using a probe to show the focusing effect
http://www.emtalk.com/tut_4.htm

when there is a probe it come with coaxial transmission line too.
and its clear how to excite coaxial line with voltage source

Dear Sahu
here you go
www.zmicrowave.ir/Coax.hfss