Simulating radar objects
R&S
®
QAT100
23
User Manual 1179.3073.02 ─ 02
When you use more than one R&S
QAT, we recommend to synchronize the fre-
quency of all R&S
QAT. One of the R&S
QAT is the primary antenna array that sup-
plies the reference frequency for the other R&S
QAT.
R&S QAT
(primary)
Ref In
Ref Out
External frequency
reference (optional)
R&S QAT
(secondary)
Ref In
Ref Out
R&S QAT
(secondary)
Ref In
Ref Out
When you use more than one R&S
QAT, we recommend using an uneven number
of R&S
QAT. Using an uneven number of R&S
QAT makes sure that a receive
antenna of the R&S
QAT is in the center of the field-of-view. This setup avoids
gaps in the center of the field of view.
Field of view
The R&S
QAT has a variable field of view and angular resolution that depends on the
setup. You can calculate it as follows using the mechanical dimensions of the
R&S
QAT. Each antenna line has a length of 351
mm with the antennas spaced
3.7
mm apart.
Field of view:
α
= 2 * tan
-1
(351 mm / d)
Angular resolution:
Δα
= tan
-1
(3.7 mm / d)
with d being the distance between front panel of the R&S
QAT and the radar sensor.
Table 5-1: Examples of field of views and resolutions at varying distances
Distance (d)
Field of view (
α
)
Resolution (
Δα
)
500 mm
38.7°
0.42°
700 mm
28.1°
0.30°
1000 mm
19.9°
0.21°
1500 mm
13.3°
0.14°
2100 mm
10.0°
0.10°
Connecting the R&S
QAT to the radar echo generator
The number and types of connections to the radar echo generator depend on the com-
plexity of your test setup. The complexity in turn depends on, for example, the number
of simulated radar objects, the number of R&S
QAT in your test setup or the number of
receive antennas you want to actually use (receive antennas do always receive, but
forward the signal only if they are connected to the backend).
Note that, depending on the number of antenna segments you want to control individu-
ally, the radar echo generator must have a corresponding number of inputs.
1. Connect the R&S
QAT to the LAN.
