6.5 Beam Patterns
The beam pattern of the radar sensor is dependent on the radar cross section (RCS) of the target.
The beam pattern graphs are guides for representative object detection capabilities based on different sized radar cross
sections and corresponding example real world targets. Use the following charts as a starting point in application setup. Note
that applications vary.
•
Use the Beam Width versus Distance chart to understand where corresponding objects can be detected. Adjusting
the signal strength threshold also affects the beam pattern when the target is constant.
•
Use the Beam Width versus Degrees chart to help determine how much the target can tilt from 90 degrees while still
maintaining detection.
Unless otherwise specified, the following beam patterns are shown with Signal Strength Threshold = 1.
T30R-1515 Models
Figure 12. Typical beam pattern, in meters, of T30R-1515 on representative
targets
2
2.0
1.5
1.0
0.5
0
0.5
1.0
1.5
2.0
4
6
8
10
12
14
16
0
Beam
W
idth
(m)
Distance (m)
Passenger Train (Radar cross section = 6000 m2)
Car (Radar cross section = 6 m2)
Weak Object (Radar cross section = 1 m2)
Figure 13. Typical beam pattern, in degrees, of T30R-1515 on
representative targets
2
20
15
10
5
0
5
10
15
20
4
6
8
10
12
14
16
0
Beam
W
idth
(degrees)
Distance (m)
Passenger Train (Radar cross section = 6000 m2)
Car (Radar cross section = 6 m2)
Weak Object (Radar cross section = 1 m2)
T30R-4545 Models
Figure 14. Typical beam pattern, in meters, of T30R-4545 on representative
targets
1
8
6
4
2
0
2
4
6
8
2
3
4
5
6
7
8
9
10
0
Beam
W
idth
(m)
Distance (m)
Passenger Train (Radar cross section = 6000 m2)
Car (Radar cross section = 6 m2)
Weak Object (Radar cross section = 1 m2)
R-GAGE
®
T30R Sensor
www.bannerengineering.com - Tel: + 1 888 373 6767
25
