How to measure VSWR of a single connector?

With a 2-port VNA, I would like to characterize the performance of a single coax connector, specifically to obtain VSWR.

The specific situation is an SMA connector at the end of a short section of semi-rigid 50 ohm coax that has no connector on the other end.

The two techniques I can think of are:

1. Add the same connector to the coax, creating a short double ended cable, and using the known electrical length, obtain the S parameters for one connector. I do not know the exact formula.

2. Try to terminate the coax with a 50 ohm load. I think that soldering a resistor would not work properly at these frequencies (>9 GHz).

Are there techniques I am missing?

• If you put a connector on each of of a transmission line of essentially zero length and measure the 2-port s parameters, you can mathematically calculate the s parameters of the individual connectors, the assumption being that they are identical. Jul 18, 2019 at 19:16
• You can get a SMA 50 ohm terminator that will work at that frequency. Jul 18, 2019 at 19:50
• @EE_socal, but you will need to find a terminator with much lower VSWR than the connector you are trying to measure. Depending on the quality of the connector and the amount you're willing to spend, that might not be possible. Jul 18, 2019 at 20:49