Chapter 4 Measurements
The following trace is an example of an antenna return loss trace.
Figure 4-6. Antenna Return Loss Trace
Calculate the threshold value and compare the recorded Lowest Return Loss to the calcu- lated threshold value.
20 log VSWR 1
Maximum Return Loss =
VSWR 1
NOTE: VSWR is the antenna manufacturer’s specified VSWR.
If the measured return loss is less than the calculated threshold value, the test fails and the antenna must be replaced.
