effective permittivity

Please simulate a 2-port short uniform TLN. MODUA will be displaying the s-parameters after simulation. Please select PROCESS->FIND TRANSMISSION LINE PARAMETERS and provide the physical length. Then, you will have a table of the Ereff vs. Frequency.

hi
can tou tell the effective permittivity formule in terms of absolute permittivity
thank you

The formula depends on the type of transmission line(microstrip, stripline, waveguide etc) but there is a condition

The condition is 1<Ereff<Er

Regards,
Akrcal

The popular formula for effective permittivity calculation only takes the two-layer dielectric into account. You can find it in the transmission part of one microwave or microstrip patch antenna part of one antenna book. It's really complicated to calculate the effective permittivity of multi-layer dielectric.

hi

akrcal wrote:
thank you but equation if you found at any time plzzzzzzzz post here
thank you[/quote]