Electronics homework (capacitors and resistors)

[BOBAH]

Homework Statement

What is the impedance of the circuit?

Homework Equations

Z=1/iwC ... Z = R ... etc..

The Attempt at a Solution

What kind of equivalent circuit can i replace it with ? I tried only two resistors and two capacitors first .. then upgrade it by two resistors and one capacitor (etc..), but can not figure out if this upgrade is parallel or in series?

 

[BOBAH]

I tried to attach the picture...

 

[Mindscrape]

It's not in parallel or series. You will have to go back and see how it is that parallel and series produce such easy zeqs, and then apply those zeq ideas to this zeq. This is almost the transmission line model, so if you get stuck you can maybe find a bit about this configuration from transmission ideas.

 

[BOBAH]

THank you for your suggestion, Mindscape.
what is "zeq" ? I googled and did not find this word.
Where shall I go back to see how parallel and series will produce smth similar??
I tried to apply Kirchhoff eqns, but i1+i2=i3 ... and V1+V2+V3+V4 = 0... so I have n unknown and n-1 equations... One equation is missing and I am not sure where shall I take it from?

 

[Mindscrape]

Zeq would be equivalent impedance. I might have just made it up, but if it doesn't exist then it certainly should. Try using node voltage analysis on the first quadrant, and see if you can discover a general formula.