RF Number of Layers

[Salahhaffar]

I want to design a simple RF amplifier circuit. The frequency is between 0.5 - 6 GHz.

- Is it enough to use 2 layers PCB board (one for the traces and the otheris for ground)?
- Is it Ok for the RF trace to be 2 or 3 Cm long (from chip to SMA connector for both in and out signals)? Because I want to use an already available enclosure I have and it's 9 Cm long (from RF-in to RF-out) connectors

 

[marce]

Hmmm, how thick would your 2 layer board be, what material would you use?
A std. 1.6mm FR4 2 layer board would require a 2.8mm wide rf trace (approx.)
A 1.0 mm FR4 2 layer board would require a 1.8mm rf trace...
In both cases the trace width is to wide.
Get Saturn PCB Toolkit and you can work out all the dimensions required, depending of dielectric and distance from rf trace to Ground plane.

--- Updated Today at 9:26 AM ---

A coplanar wave guide would reduce the trace width, a 1.0mm FR4 board, 0.7mm trace width, 1.25mm gap between trace and adjacent ground planes on same side, ground plane on second layer.