wave port size

Hello everybody,

I have a few questions on the wave port.

For a dipole antenna with a coplanar line feed on a dielectric substrate I have to define a wave port. By changing the size the s-parameter will change as well. What is the reason? Theory?

What is the optimal wave port size?

Regards,
H.

It matters in complicated ways that i am not positive on. However, may I recommend:

http://www.emtalk.com/waveport_calc.htm

This will estimate the proper wave port size to use for you

Ok., on http://www.emtalk.com/waveport_calc.htm, there is one strip and I have two.
It is possible to use the distance between the two strips (outer region) as w?

You gave me a tool to calculate the wave size for one strip on a substrate with a ground plate.
Has somebody an idea how to determine the size of a wave port for a coplanar strip on a substrate without a ground plate?

hi,
can you give me the formula to fix the wave port dimension?

I have no formula but for one strip you can use the tool on http://www.emtalk.com/waveport_calc.htm.
Has somebody a rule to create the ideal size of the wave port?