W-band out-of-phase active power divider with continuously tunable power division ratio and invariant phase difference

In this study, a W-band out-of-phase active power divider, with continuously tunable power division ratio, has been presented. Out-of-phase signal is generated by the compact transform balun with accurate phase and amplitude response. To stabilise the phase difference in different power division ratio, phase-invariant cascode variable gain amplifier (VGA) is designed in the two paths of the active...