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What are the principles or techniques for VHF board design?

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Muhammad Furqan

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PCB design for VHF

i want to know any technique or principles that should be followed for VHF board design(PCB)
operating frequency is 70MHz
 

Re: PCB design for VHF

You must use double sided board, The part that the components will be showing is the full copper side so do not etch away this side. it acts as a ground plane.

Use a over size drill bit to open around the holes the components are passing through, so the legs will not make contact with the ground plane, unless that component is going to ground. Do not drill straight through with this oversize bit.

Tracing will be on the other side of the board. Use the thickest size tracing possible with reference to your design. Normally on the tracing are squares and rectangle shapes.

Hope this helps

Cheers

Node
 

Re: PCB design for VHF

If you use an external oscillator, you should provide a separate ground for it and preferably to avoid have signal traces routed near or around it. As much as possible, route them in space far from it. You might not need a guard ring or special isolation as it is only 70-MHz.

If you have digital and analog parts, use separate power and ground, a digital one and a clean one for analog.

Isolate as much as possible, ground all your I/O heavily and place them far from digital components. You may have analog components residing in PCB space between digital and I/O PCB space.
 

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