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 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.
