User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Reserved. Page 38 of 82
Mod. 0805 2011-07 Rev.2
7.2.2. Transmission line measurements
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 GE866-QUAD 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: