With constant increase in PCB data rate, transmission-line loss becomes important in determining a good or bad PCB. Traditional TDR measurements cannot provide sufficient information of the transmission-line loss. Engineers should consider using a VNA and a de-embedding technique for PCB characterization.
PCB Probing Tips
- Use a test probe assembly with mechanical guide pins. This approach offers fast test time and excellent measurement accuracy.
- Choose a VNA with integrated de-embedding tool to acquire and display real-time transmission-line SnP data.
PCB Characterization Setup
An R&S ZNB20 VNA and two handheld D-Probes are used to test a 20 GHz PCB.
An integrated R&S ZNB20 VNA de-embedding application offers fast real-time measurements and extraction of transmission-line loss.