Advanced de-embedding software for vector network analyzers
New features include S-parameter resampling of acquired data and the ability to create an equivalent 2‐port network which can be used to de‐embed a device under test (DUT) from measured S‐parameters in a more traditional way.
S-parameter resampling
It is customary for the frequencies used to make S‐parameter measurements to form a harmonic data set. However, if an engineer has not appropriately sampled an S-parameter with the vector network analyzer (VNA), measurement accuracy can be compromised.
“If the original data is not derived from a harmonic calibration, Spectro VNA Pro can resample the data easily,” said Donald Metzger, president and chief technologist of Constant Wave. “The engineer does not need to recalibrate the VNA and make a new measurement.”
De-embedding 2-port networks
Sometimes a DUT being measured by a vector network analyzer is not simply a single device. The DUT may include connectors, cables, transmission lines, and other components which lie between the calibration reference plane and the target device being measured. While conventional test methods compensate for measurement errors up to the calibration reference plane, the intervening components represent another source of measurement error.
Mr. Metzger concluded, “Spectro VNA Pro’s de-embedding 2-port function is derived from our Time Domain Substitution methodology. The software characterizes 2-port adapters or networks quickly and creates a de-embedding file which can be put back into a VNA.”
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