Patent ID: 9331670
Filing Date: 2016-05-03
CPC Classification: G01R,H03J

Claim Text:
1. A microwave hybrid (active-passive) load pull set-up for testing a device under test (DUT), comprising a) a cascade of active gamma boosting unit (GBU), having an input port and an output port, and b) a passive electro-mechanical tuner having an input port and an output port; whereby the DUT has an input port and an output port, and whereby the GBU is inserted between the output port of the DUT and the input port of the tuner; and whereby the GBU comprises two signal processing three-port blocks, one block adjacent to the DUT and one adjacent to the tuner, whereby the block adjacent to the DUT acts as power combiner, and the block adjacent to the tuner acts as power divider; said blocks having an input port, an output port and a coupled port; and whereby a sample of the signal power traversing between the input port and the output port is extracted through the coupled port, and whereby the path between input port and output port has low loss; and a cascade of a broadband microwave amplifier, said amplifier having an input port and an output port, and a broadband variable phase shifter and variable time delay, said cascade being inserted between the coupled ports of the blocks, and whereby the output port of the amplifier is connected with the coupled port of the block adjacent to the DUT; and whereby the output port of the tuner is terminated with a microwave load or a microwave test instrument.