Rohde & Schwarz App Note: Generating
Multiple Phase Coherent Signals
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 test signals must have a specific or definable phase difference (relative
phase) and definable amplitude. Some of the challenges for such a test system include
compactness, phase control capability and simplicity in handling. In particular, phase
stability between the channels is of importance.
application note explains how to generate phase coherent signals.
It details what to consider and how to configure the test setup and describes in detail
how to best calibrate the relative phases and timing between the individual channels
and when to repeat the calibration.
About Rohde & Schwarz
Founded more than 80 years ago, Rohde & Schwarz is one of the world's leading
manufacturers of information and communications technology products for professional
users. Initially focusing on RF engineering and RF applications in test and
measurement, radiocommunications and broadcasting, the company has continually
expanded its fields of activity over the past decades. In the meantime Rohde &
Schwarz has also become one of Germany's largest manufacturers of IT security
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Posted April 17, 2018