Hardware and physical integration guideline PCR Sensor A111
Page 5 of 32
2022-03-08
© 2022 by Acconeer
– All rights reserved
1.2 Radar loop radiation pattern
When characterizing the gain, we refer to the radar loop gain defined in the radar equation section.
Figure 2 shows the radar setup configuration for the radar loop radiation pattern measurement. The
reflector which in this case is a circular trihedral corner (radius of 3.8 cm) is located at the far-field
distance from the sensor (1 m). The far-field distance can be determined by the aperture of the sensor
and the radar target.
𝑅
farfield
>
2𝐴
2
𝜆
(2)
where A is the largest dimension of either the sensor or the radar target. Envelope service can be used
to collect the reflected power at the fix distance from the radar target at different rotation angle. The
amplitude variation stated in the document shows one direction (TX or RX side). The radar loop gain
(RLG) is in fact twice the amplitude value. This is applicable for all the figures which state the amplitude
variation of the radome and the lens.
Figure 2. Measurement setup for radar loop radiation pattern.
