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Quality of TRL kit

Question asked by peol1 on Dec 16, 2013
Latest reply on Dec 17, 2013 by peol1

I have fabricated a TRL-kit on PCB. Unfortunately, the sma connector foot print degrades the return loss of the connector-pcb transistion down to approx. -15dB. Is there a rule-of-thumb on how good the return loss of a TRL kit need to be in order to work? I guess there has to be some sort of limit? The lines inside the sma connectors are good 50ohm lines.