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I bought one SP4T (Single Pole Four Through)  switch from one US company. This switch’s size seems to be a little large. I decided to purchase this SW because it shows very small insertion loss and large power capacity.

JETSTREAM JTCS4M

2016-10-14-09-22-39

This figure shows how I measure the insertion loss and other parameters with VNWA.

2016-10-14-11-26-56
OFF State. SW knob is connected to port 1. VNWA is connected to port 2
2016-10-14-11-26-52
ON State. SW knob is connected to port 1. VNWA is connected to port 1

Here is the measured results. Very amazing!

sw_off
At OFF state, Yellow line shows the S21 (transmission) and Blue line shows the S11 (reflection)
sw_on
At ON state, Yellow line shows the S21 (transmission) and Blue line shows the S11 (reflection)
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