Experimental characterization and control of a four-way non-isolating power combiner

In multi-way outphasing systems, a particular output power can be produced by multiple different combinations of input control phases. As a result, outphasing control angles can be selected to satisfy additional criteria, for example to control the input impedances to the four ports. This work explores an experimentally-determined outphasing control law based on network analyzer measurements of a fabricated 4-way combining structure. The experimental control law improves matching among the four input ports by approximately 10%.