Considerations for High speed PCB design (single sided )

[celestine]

Hello there everyone,
I'm trying to to fabricate a FM transmitter (audio guru's MOD4) on a PCB however i only have experience with low speed PCB design fabrication. Is there anywhere i can get reference to tips and hints for good high speed PCB design? (cricuit will be operation around 88MHz-108MHz) or any hints from any experienced pros here?(Note: i'm a total newbie in RF and am trying to pickup the subject haha) please do advice and thank you very much in advance!

 

[tony_lth]

88M~108M is very low freq, you can do it as lumped lement requirement. High speed PCB normally ref to the datarate up to 1Gb/s.

 

[volker_muehlhaus]

"High speed" refers to designs where transmission line effects become important, i.e. when the layout is no longer small compared to the wavelength. In this case, you want to think in terms of impedance matched lines etc.

For your FM transmitter, the lines on PCB will be very short compared to the wavelength, so that this is not an issue. If there are parasitic layout effects, you can use "low frequency" calculations to estimate line inductance, parasitic capacitance of wide lines to ground etc.