Test platform, group testing system, and group testing method

A group testing system comprising:

• a measurement device;
• a test platform electrically connected to the measurement device and configured for connection to a plurality of devices under testing, the test platform comprising:
• a plurality of signal transmission paths including a plurality of distribution elements configured to distribute a measurement signal from a single port of the measurement device to the plurality of devices under testing;
• and
• a plurality of signal receiving paths including a plurality of combining elements and a plurality of phase shifters, wherein:
• each combining element of the plurality of combining elements is configured to combine response signals from at least two of the plurality of devices under testing and output a combined signal to the measurement device, and
• for a first device under testing and a second device under testing, included in the plurality of devices under testing, that receive distributed signals from a common distribution element of the plurality of distribution elements and respectively generate a first response signal and a second response signal in response to the distributed signals, at least one phase shifter of the plurality of phase shifters imparts a phase shift to at least one of the first response signal and the second response signal before the first response signal and the second response signal are combined by one of the plurality of combining elements, such that a predetermined phase difference exists between the first response signal and the second response signal;
• and
• a controller coupled to the measurement device and the test platform, the controller configured to switch the test platform between a first measurement stage and a second measurement stage by controlling phase values of the plurality of phase shifters,
• wherein the measurement device is configured to determine scattering parameters of the plurality of devices under testing based on signals received during the first measurement stage and the second measurement stage.

A method for group testing of devices under testing, the method comprising:

• transmitting a measurement signal from a single port of a measurement device through a test platform;
• distributing the measurement signal through a plurality of signal transmission paths to a plurality of devices under testing that is connected to the test platform, the plurality of signal transmission paths including a plurality of distribution elements;
• receiving response signals, generated by the plurality of devices under testing in response to the measurement signal, through a plurality of signal receiving paths and transmitting the response signals to the measurement device, the plurality of signal receiving paths including a plurality of combining elements and a plurality of phase shifters, wherein:
• for a first device under testing and a second device under testing, included in the plurality of devices under testing, that receive distributed signals from a common distribution element of the plurality of distribution elements and respectively generate a first response signal and a second response signal in response to the distributed signals, at least one phase shifter of the plurality of phase shifters imparts a phase shift to at least one of the first response signal and the second response signal before the first response signal and the second response signal are combined by one of the plurality of combining elements, such that a predetermined phase difference exists between the first response signal and the second response signal;
• controlling the test platform to switch between a first measurement stage and a second measurement stage;
• and
• determining scattering parameters of the plurality of devices under testing based on the response signals received by the measurement device during the first measurement stage and the second measurement stage.