This 24 GHz Radar demonstrator is a result of the "FahrRad" project. The module sR-2400e and the Development Kit DK-sR-2400e have 2 transmit (Tx) and 4 receive (Rx) channels for targets range measurement and azimuth angle estimation. The angles are determined by time-of-arrival parameters from the Rx1...Rx4 receiver antennas. The two transmit antennas are designed for wide (70°) and narrow (30°) view. Digital Beam Forming (DBF) is feasible. The radar signal processor allows fast FMCW chirp sequences for range-velocity evaluation. The radar module has an Ethernet interface. The Developer Kit DK-sR-2400e comes with a Graphical User Interface (GUI) called SenTool. SenTool makes it easy to configure the sensor and to measure, visualize and analyze radar data in several different graphical plots.

sR-2400e Antenna Farfiled Simualtions: 30° and 70° Beamwidth

Farfield of wide and narrow antenna beam.<br>

Farfield Patterns of wide and narrow Antenna Beams

TECHNICAL DATA
GENERAL
Modulation:FMCW
Operating Frequency:24.0 GHz - 24.25 GHz (ISM band), max. BW = 700 MHz
Number of Channels:2 Tx, 4 Rx
Data Interface:Ethernet with Power-over-Ethernet
ANTENNA
Antenna Type:Integrated Patch Antennas
Tx1 Antenna Characteristics:70° Azimuth, 10° Elevation (Wide View)
Tx2 Antenna Characteristics:30° Azimuth, 10° Elevation (Narrow View)
Rx1…Rx4 Antenna Characteristics:70° Azimuth, 10° Elevation
Antenna Gain:14 dBi (Tx1), 18 dBi (Tx2), 14 dBi (Rx1…Rx4)
Antenna Polarization:linear
MEASUREMENT
Min. Measurement Range:0.6 m (@ ISM band)
Max. Measurement Range:154 m (@ ISM band)
Range Resolution:0.6 m (@ ISM band)
Max/Min Velocity:T4=0µs: ±54 m/s, T4=1ms: ±3.2 m/s
Velocity Resolution:dV(T4=0µs) = 1.7 m/s, dV(T4=1ms) = 0.1 m/s
Target Detection, Max Targets:28
FMCW PERFORMANCE
Frequency Chirp Sequence:64 Chirps for Range-Velocity Evaluation
Chips Configuration:T1= 2 µs (Init. Time), T2= 51.2 µs (Ramp Time),
T3= 5.22 µs (Ramp Reset), T4= 0 to 1 ms (Ramp Delay)
Typical Update Rate:typ. 30 Hz (depending on application)
Output Power Tx1 (EIRP):0 to 27 dBm, tunable (20 dBm @ ISM band)
Output Power Tx2 (EIRP):6 to 33 dBm, tunable (20 dBm @ ISM band)
TEMPERATURE
Min. Operating Temperature:-40°C
Max. Operating Temperature:+60°C
POWER SUPPLY
Operation Voltage:48 V with PoE (36 V to 57 V, IEEE 802.af)
Standby Power:2.2 W
Operating Power:5.5 W
HOUSING
Dimensions (L x W x H):125 mm x 80 mm x 50 mm (Housing)
125 mm x 100 mm x 50 mm (with Bushing)
Weight:220 g (with 25 cm cable)
Material:ABS (UL94-HB)
Connection Cable and Connector:CAT-6 with RJ45 Female Plug (Ethernet)
Protection Code for Housing:IP54

Demonstrator Data Sheet sR-2400e

More details about the sR-2400e can be found in the demonstrator data sheet.

Data Sheet
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