w patch = w feed or less?

if the patch have a same width with feeder, is it can be still as a patch?
for some substrate thick there has no ground on back side, and add a shape on same side with conductor, how it be same function of groundplane, is it CPW structure but have different formula to calculate feeder width

You will do yourself a favor formulating your question in better English.
I have no idea what you said there.

The feed width should be 3mm if you are using a SMA connector. The SMA connector has 50 ohm impedance so there be impedance matching. by using 3mm microstrip feed you will get approximately 50 ohm impedance.
i still dont get your question.....

I have question for matching to sma it is always the feeding width 3 mm if I design in layout for any types of antenna

How you can calculate this width 3 mm