In article ,
David wrote:

On Sun, 04 Nov 2007 00:17:26 -0000, wrote:

On Nov 3, 5:49 pm, Telamon
wrote:
In article .com,

wrote:
If you need to prototype or build a lumped element RF filter, check
out the RF Filter PCBs at RF Bites.

http://www.rfbites.com

Those are not very good coax to PCB connectors. You can do better. Must
be pretty low frequency stuff ( 1 GHz ) if you are using FR4.

--
Telamon
Ventura, California

Connectors are rated to 12GHz.

FR-4 is good up to 3.5GHz, then it starts to fall apart.

http://en.wikipedia.org/wiki/FR4

There are much better places to go on the Internet to read about PCB
dielectrics then Wikipedia.

You will notice that FR4 has a high dielectric constant together with a
poor loss tangent means it is very lossy at high frequencies.

--
Telamon
Ventura, California