From reading between the lines (RFID) I got the impression the OP was after
an antenna not a transmission line.
Steve N.

"Tom Bruhns" wrote in message
m...
Stripline will work fine at 13MHz. I'd expect it to have a
characteristic impedance that's practically identical to what it has
at microwave frequencies, for any practical size line. If it's a
short run connecting to a load that's the same impedance as the line,
that's probably all you need to know, but if you're using it for a
matching stub or series matching section, you'll need to worry about
loss and propagation velocity and things like that...and in general,
at 13MHz you'll find it more efficient in both volume and power loss
to use a lumped matching network.

Tell us more specifically what you are trying to do, and we may be
able to give more help.

Cheers,
Tom

"Massi" wrote in message
...
Hello to everybody,
first of all I say sorry for my bad English and for my really bad
knowledge.
I'm projecting an antenna for RFID (13.56 MHz) and I don't know if is
possible to use a strip line with this frequency.
I've seen that in some books there are some theory equations regarding
GHz,
but nothing about Mhz.
Is the wavelenght too long compare to the dimension of a stripline?
Thank you,

Massimo