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Synthetic Aperture Radar for UAVs
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Small 12lb Synthetic Aperture Radar
Small on-board SAR system provides imagery for enhanced situational
awareness
35 GHz Frequency Modulated Continuous Wave (FMCW) Radar for SAR
Provides SAR capability, Ground Moving Target Indicator (GMTI) capability,
Terrain awareness, and Sense and Avoid solution for UAVs
System Features: (High level)
 | Operating frequency 35GHz, 12 lbs total weight |
| Low profile, 2 Watt transmitted power |
| Design to detect a 1m2 target from 10 km away |
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| - | Profile of a stop sign from 5.8km away |
| - | Cessna 172 from 15 km away |
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| Single antenna, mono-static configuration with adaptive leakage
cancellation |
| Light weight gimbals using piezo-electric motor |
| DDS based exciter with linearity <.001% |
| COTS MMICâs for mm-wave transceiver |
| Multi-chip module based on unique design & assembly techniques |
| Active sensor interfaces with on-board equipment via ethernet/802.11 |
| Easy to install |
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| System Specifications |
| Total Weight | < 12 lbs (with no motion-compensation) |
| Size | 8 x 8 x18 inches |
| Prime DC Power | 75 watts typical |
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| Range Resolution | 0.1 m (SAR) |
| Detection Range | 10 km @ 1m^2 target |
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| Center Frequency | 35 GHz |
| Transmitted Power | 2 Watts |
| Antenna | 6 in. diameter 4 º beam width |
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| FPGA based Radar Signal Processing | Virtex 4 |
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| Operating temperature | -30 to +40 deg. C |
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| Transceiver |
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| Scanning Antenna |
| Lens with splash plate |
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| - | Simplicity |
| - | Tiny piezoelectric motor |
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| Antenna servo |
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| - | COTS driver & controller with robust packaging
approach |
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| Azimuth Coverage | 360º |
| Elevation Coverage | +/- 20º |
| Scanning profile raster, fully programmable |
| Beam width, 3dB | 4º |
| Gain | 33 dBi |
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| Low Cost Replaceable Radome |
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| Radome rotates with the antenna in AZ |
| Manufactured using thermal plastic and vacuum forming |
| Detachable MMW portion |
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| - | Ensures better radar transmission |
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| Components |
| Leakage Canceller &
MM-wave converters |
| Custom patented modules for interconnection |
| Digital closed-loop control |
| COTS FPGA implementation |
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| Exciter & Baseband
IF |
| Linear FM modulation (saw tooth) |
| Fully programmable via Ethernet with GUI |
| All COTS components, PCB construction |
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| RSPU
Implementation |
| COTS ADC with on-board FPGA and a tinyPC embedded controller |
| < 1 lbs package, multiple PCB stacked configuration |
| Platform interface |
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| - | Commercial available GPS and INS |
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| Motion
Compensation |
| Requires for SAR/GMTI mode |
| GPS/INS integrated solution |
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| - | Low cost, low power MEM based IMU |
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| Ultra light weight < 1.5 Oz |
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