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What is the theoretical minimum and maximum track width of 50 ohm RF trace (2.4GHz)?

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tennythomas

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Hi,

It is said that the track width of 50 ohm impedance RF trace carrying 2.4 GHz should be wide but not thin.

What is the theoretical minimum and maximum track width of the same? 3.3V power supply is used.

Thanks in advance.
 

Re: RF Trace width

What is changing between having a thin trace and a very wide trace is inductance vs capacitance. The wider and closer a trace is to a reference plane the larger the capacitance will be. There is a lot to know about this (more than simply I vs C) so I would suggest doing some research on the web.
We typically try to use a trace that is the same diameter as an 0402 pad. (about 1mm) Doing this will reduce inconsistancies along transmission line.

eda
 
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