coupling effect between microstrip lines

hi guys
what exactly is the coupling effect between 2 parallel microstrip lines and how does it affect a filter's performance? is the coupling effect between the lines a form of capacitance ?
Thanks alot

Hello Prabu,

The best book I found useful for you is

R.Mongia, I.Bahl, and P.Bhartia, RF and Microwave Coupled-Line Circuits. Boston: Artech House, 1999,
specifically chapter.4.

Which has lot of information about coupled line models....


---manju---

hie...i tried searchin for the book but its not available here
can you pls explain to me in brief for my question because it is really urgent
thanks alot for ur help