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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
Lee Hill is an industry expert in electromagnetic compatibility and founding partner
of SILENT Solutions LLC, an EMC and RF design firm established in 1992. Lee provides
EMC troubleshooting services, design reviews, and training to a wide variety of industries
nationally and around the world and also is a member of the adjunct faculty at Worcester
Polytechnic Institute (WPI) where he teaches graduate-level classes in EMC. Lee also
teaches at the University of Oxford (England), and for the IEEE EMC Society's annual
Global University and EMC Fundamentals program. He earned his MSEE in electromagnetics
from the Missouri University of Science and Technology EMC Laboratory.
Rohde & Schwarz USA, Inc.
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Columbia, MD 21046
Europe, Africa, Middle East
+49 89 4129 12345
+1 888 837 8772
+1 410 910 79 88
+65 65 13 04 88
+86 800 810 8228 or +86 400 650 5896
Posted April 17, 2018