Equivalent Electrical circuit of transmission lines

Hello,

I want the equivalent electrical circuit of

1) Stripline

2) Microstrip line

Also, can anybody tell me whether there is any book which tells us how to mathematically model a stripline to microstrip transition ?

Regards,
Avi

The usual way is what looks like a lossy low pass filter. Series R and L with a shunt C on the far side. These values are very small and it takes a few hundred sections per cm of line length.