Measurements and result displays
R&S
®
QAR50
45
User Manual 1179.4992.02 ─ 02
The interpretation of the percentage value depends on the measurement.
●
Reflection measurement: 100 % reflection = complete energy is reflected by the
DUT
●
Transmission measurement: 100 % transmission attenuation = complete energy is
attenuated by the DUT (no energy arrives at the receiving cluster)
Figure 8-8: Overview of the numerical result table
The numerical results are calculated over all measurement points within the
that do not deviate more than 3
dB from the maximum reflection or minimum
attenuation value. These measurement points are indicated by a black line in the
The table contains the following results:
●
Mean reflection for cluster 1 and 2, and frequency bands 1 and 2
The mean reflection indicates the radar transparency of the DUT. The lower the
mean reflection, the better the radar transparency of the DUT. A higher mean
reflection results in beam refraction, increased transmission loss and standing
waves between the DUT and the radar sensor. For optimal radar compatibility, the
DUT's mean reflection has to be minimized.
●
Mean transmission attenuation for frequency bands 1 and 2.
The mean transmission attenuation is calculated as follows:
-20·log10(mean transmission coefficient)
with mean transmission coefficient = 1 - attenuation
The mean transmission coefficient is calculated over the respective frequency
range.
Result displays
