User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved. Page 49 of 97
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 GE864-QUAD V2 or GE864-GPS 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:
0.3 mm
0
.
0
3
5
m
m
0.3 mm
6
.
2
m
m
FR4
0
.
0
3
5
m
m
0
.
0
3
5
m
m
1
.
3
3
5
m
m
0
.
2
m
m
1
.
1
m
m
L3
L2
L1
1.1 mm