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i want to design a marchand balun for my spiral antenna. how can i test phase of the balun in VNA? how know it working properly ??
If it's 1:1 BalUn, you may connect either an identical balun back-to-back to measure the performance.View attachment 119995
Thank you for your replays. i have attached the balun drawing . i have two port VNA. i connected port1(unbalanced coaxial) and port2(output) as per in the image. i found the impedance of the balun by terminating port2 with 50 ohm but i didnt understand how to measure the phase balance of the balun. i measure the phase at port 2 but where did i get reference phase for taking phase difference??