QAR50 Radome Tester


The QAR50 tester measures radomes and bumpers in production, and its design ensures short measurement times and accurate, reproducible results. A highly modular software concept allows the tester to be adapted to individual requirements.


It uses microwave imaging, which has numerous advantages compared to conventional, unfocused single-point measurements. The user-friendly interface simplifies measurements in the automotive radar frequency band – even for users without detailed RF knowledge. Numerous optimizations allow measurement times below five seconds, significantly reducing cycle times in production.


The imaging method provides information on whether the components under test are properly positioned. While single-point measurements only display the frequency response of reflectivity for a specific point, the tester also displays the spatial distribution of reflectivity. Tracking the point of maximum reflection provides information on component positioning. Since this method allows the transmit and receive antennas to be far apart without affecting the measurement results, the QAR50 offers significantly more space for clamping and unclamping the components to be measured. The clearance height of around 39.4 in. (100 cm) between the antenna clusters minimizes the mechanical effort required to position the components. This eliminates the need for robot positioners and carriages, and the enclosures required for occupational safety can be smaller.


Depending on the software configuration, complete limit tests for transmission loss, transmission phase, homogeneity, and reflectivity can be performed in the frequency and spatial domains.


  • RF transmission loss and reflection measurement in the automotive radar bands (76-81 GHz)
  • Extremely short cycle time creates high throughput in production
  • High resolution reflection image enables more optical-like analysis
  • VNA-like accuracy with high resolution imaging and spatially-resolved phase capability
  • Self calibration supported, no dismounting or external equipment required
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