Hi.
When I do load-pull measurement,
I use 4port_directional_coupler + variable_attenuator + sliding_short.
This is well-known passive load-pull method.
But my directional coupler is not good.
Is there any good directional coupler of 5GHz ~ 6.5GHz ?
The following system is very expensive.
http://www.maurymw.com/products/rfdcs/loadpull/atsprods/atsintro.htmHow do you do load-pull measurement inexpensively for 5GHz ~ 6.5GHz ?