PCB via hole

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Sokha

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Hi all respective member!
I am working with PCB routing to POGO pin, but after I place PCB over pogo's pin the result is lossy and even has some spike at center frequency due to impedance mismatch.
So is there a tool or technote that tells about the via hole diameter with copper plated thickness to archive 50-ohm copper plated via hole?
If someone who is experienced in this matter kindly gives some advice!
Thank you so much.
Please refer to attached file( What I am doing)
 

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Hole diameter determines impedance in combination with pad and antipad diameter and plane configuration. We need to see a PCB cross section with connector. What's the frequency range?

Also single pogo pin makes no sense for single ended transmission line. You need suitable ground connection or differential TL configuration.
 

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You're right Sir.
The center frequency of the PCB is 1.5 GHz and the pad attached to SMA connector.
It is not a single pogo pin, it is 4 ports network. We want to see the crosstalk also.
Kindly see the attached new image configuration and S-parameter.
I hope you can point/provide an idea about this design.
Thank you so much for your time.

 

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