SYMEO Local Positioning Radar System
Product Family LPR
®
-1DHP-200 – Product Documentation
Radar Basics
Copyright © Symeo GmbH 2018
DOC.EDO.000341.WORK.EN_LPR-1DHP-200_Product-Documentation.docx
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Figure 3.2: Fresnel zone
Table 3.2: Fresnel zone radius vs. distance
3.4 Radar Modes
3.4.1
Primary Radar Mode
In primary radar mode, a single radar measures the distance and speed to a reflective object
/ target, typically a metal corner reflector. The following features differentiate the primary
radar mode from the other radar modes:
Suitable for ranges up to 50 m
Range depends on target radar cross section (RCS)
Very high update rate (up to 350 Hz)
Cost effective installation with a single radar
Distance measurements to passive objects enable additional applications for primary radar
mode,:
Presence / absence check (e.g. in a radar barrier)
Profile / measurement (e.g. of bulk material)
Detection of arbitrary objects (e.g. of personell or vehicles)
Figure 3.3
shows the typical setup of a LPR
®
-1DHP-220-R radar and a corner reflector for a
primary radar distance measurement.
Distance d in m
10
20
30
40
50
70
100
200
300
400
600
Fresnel Zone
Radius r in m
0.11
0.16
0.19
0.22
0.25
0.30
0.36
0.50
0.62
0.71
0.86
