Testing multi-antenna systems such as phased array or beamforming antennas requires a test system capable of providing multiple signals with constant phase relationships between them. The coherent ...

Quantum phase transitions describe abrupt changes in the ground state of a quantum system at absolute zero when a control parameter is varied. They are distinguished from classical phase transitions ...

Preserving coherence keeps quantum systems clear and comprehensible. We say a message is incoherent when we can’t make it out, or when it doesn’t make sense. A scribbled note, a drunken argument or a ...

This application note explains how to generate phase coherent signals, what to consider and how to best calibrate the relative phases and timing between the individual channels. Rohde & Schwarz signal ...