Instrument tour
R&S
®
QAR50
25
User Manual 1179.4992.02 ─ 02
5.1.2
Antenna cluster
Number of clusters
: 2
Function
: The antenna clusters are located in the side body of the R&S
QAR50. The
antenna clusters contain the transmit and receive antennas. These antennas transmit
and receive the signals to and from the DUT and digitize the resulting incident wave
quantities, which are in turn the source for the microwave imaging.
Depending on the system variant, the antennas have a vertical polarization or a hori-
zontal polarization.
●
The variant with a vertical antenna polarization is required for measurements on
radar covers with a vertical polarization.
●
The variant with a horizontal antenna polarization is required for measurements on
radar covers with a horizontal polarization.
The R&S
QAR50 contains two clusters:
●
Cluster "2" is located on the side of the connector board.
●
Cluster "1" is located on the other side.
For better orientation, the cluster numbers are printed on the corresponding cluster.
5.1.3
Absorbers
Number of absorber sheets
: 5
Function
: The absorber sheets on the inside of the R&S
QAR50 eliminate electromag-
netic interferences that would otherwise distort the reflection and transmission mea-
surements.
5.1.4
Mounting rail for the verification kit
Number of mounting rails
: 2 (one on each side of the main body)
Function
: The mounting rails for the verification kit are located in the center of each
side of the R&S
QAR50 body. Use these rails to install the verification kit if you have to
verify the system.
For a comprehensive description of the verification procedure, see
5.1.5
Calibration sphere
Number of calibration spheres
: 2
Function
: The calibration spheres are located in the side body of the R&S
QAR50.
The calibration spheres are passive features required for instrument calibration. Sys-
tem calibration becomes necessary after a module has been replaced or if the verifica-
tion returns a poor image quality.
System overview
