I have a 3m long transmission line that transmits a 100ns bipolar square pulse every 200us. At the beginning of the coax cable is a pulsing circuit board, that generates the waveform, then it sends the pulse through a 50 ohm 3 m long coax line and at the other end of the coax line is connected to a load of 20 ohm.
I have noticed that by placing 6dB attenuators near at the output of the pulsing board then attaching the coax lines in series results in a greater power output from the load.
Is this due to the damping of reflections?
In addition would placing the attenuation close to the load result in a greater power transfer since the reflections are attenuated before travelling back a good portion of the cable? I can not try this scenario yet as I do not have the correct connectors to attempt this.