[SI-LIST] impedance matching for high freq PCB

Dear SI experts,

I am working on a project to test high speed optoelectronic circuits 
(hopefully up to the 1-3GHz range).  I am making a PCB board to drive the 
circuit (a CMOS gate).  So I am faced with the problem of matching a 50Ohm 
line to almost infinite impedance.

1) Traditional termination schemes using resistors such as parallel and 
series termination - up to what frequencies are these methods valid?

2) if not, what other schemes should be considered?

Thank you in advance,
Betty


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