Today we tested a SWR Bridge in our R&D Lab.The SWR Bridge is made by using 6mm toroids winded with 10 turns of 26 SWG copper wire. And also we used 3mm copper tube as shown in figure with wires shorted in two ends. The above circuit is taken from the RF publication issued in 1985. We have only implemented the circuit. The standard SWR's measured are: Zo, Zo/2 and Zo/3.
The below formula is used to measure the SWR:
SWR = (Vforward + Vreverse)/(Vforward - Vreverse)
Schematic diagram is shown below.
