8. De-Embedding
In addition to the TTC & 12TC calibration method described in chapter
, the
Seunis measurement software features a frequency domain method for de-
embedding components like adapters, cables, probes and also more com-
plex systems like multiplexers (chapter
). In this context all parts just men-
tioned are referred to as
fixtures
.
In the following sections the basic principles and practical approaches to
de-embed fixtures are described. A basic requirement for using the de-
embedding functionality is that the system has been calibrated (TTC/12TC)
beforehand.
8.1 De-Embedding Basics
The applied frequency domain method is well-established and widely used
for de-embedding. Subsequently the task of measuring an unkown single-
ended 2-port element (DUT) shall be solved. For this purpose the full 2-port
measurement mode (see section
) has to be used. Please note that mea-
suring de-embedded
S
11
and
DS
11
(see section
) can be achieved accord-
ingly.
Figure 15: Decomposition of overall system into subcomponents
69