User's Manual

UE866 HARDWARE USER GUIDE 1vv0301157 Rev.7 • 2015-04-17 50 of 68
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Transmission Line Measurements
An HP8753E VNA (Full-2-port calibration) has been used in this measurement session.
A calibrated coaxial cable has been soldered at the pad corresponding to RF output; a SMA connector
has been soldered to the board in order to characterize the losses of the transmission line including
the connector itself. During Return Loss / impedance measurements, the transmission line has been
terminated to 50 Ω load.
Return Loss plot of line under test is shown below:
Line input impedance (in Smith Chart format, once the line has been terminated to 50 Ω load) is
shown in the following figure: