Specifications

Example Using Flexible Calibration
Figure 7-8 shows a 3-port device consisting of a 1-port
resonator/antenna and a 2-port sub-DUT. If leakage is not of interest,
you would really want to measure only five parameters instead of
nine. The idea is to avoid measuring more than is needed.
The 3-port DUT has an integrated antenna, to be treated as a single
port, and an amplifier path, to be treated as a separate 2-port device.
The following will illustrate that in partially connected DUTs, such as
this, there is no accuracy penalty in using the Flexible Calibration
mode.
A full 3-port calibration and measurements over the 700 MHz to
1000 MHz frequency range were performed. Both the full 3-port
calibration results and the Flexible Calibration results, defined as
CUSTOM CAL with the S11, S12, S21, S22, and S33 parameters
enabled, are compared on an overlay in Figure 7-9 on the following
page.
LRL/LRM MEASUREMENT
CALIBRATION CALIBRATION
7-36 MS462XX OM
3-port VNA
Port 3
Port 1 Port 2
Antenna
DUT
Figure 7-8. 3-Port VNA Measuring a 3-Port Device