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8-Axis Robotic Antenna Measurement System
Model: RAMS
Features
- C band to mm-Wave frequencies
- High accuracy positioners
- Automatic electronic spherical near-field alignment capability
- Complete 3D characterization
- Far-field, holographic and near-field patterns
RAMS: Precision Robotic Arm System for High-Load, Multi-Axis Near-Field Antenna Testing
The RAMS uses a 6-axis precision robotic arm that acts as y-axis for planar near-field and cylindrical near-field and theta-axis for spherical near-field acquisitions. It also incorporates a small (500 mm diameter) rotary positioner that is used as a phi-axis for cylindrical near-field and spherical near-field acquisitions. This positioner can support test article loads of up to 4,500 kg (10,000 lb). The RAMS also uses a precision linear translation positioner that is used as an x-axis for planar near-field acquisition and robot repositioning.
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Specifications
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Applications
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Capabilities
| Construction | 8-Axis system comprised of 6-Axis robotic arm with precision X-axis translation positioner and Phi-axis rotation positioner |
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| Drive System | Precision Stepper Motor & Servo with Absolute Encoder |
| PNF Scan Area (nominal) | 2.4 m x 1.2 m (8 ft x 4 ft) |
| CNF Scan Height (nominal) | 1.2 m (4 ft) Radius: 1 m (40 in.) |
| SNF Scan Area | 360° in Phi and 165° in Theta with 1 m (40 in.) Radius |
| Maximum Antenna Load | 4,500 kg (10,000 lb) |
| Maximum Antenna Diameter (SNF) | 760 mm (30 in.) |
| System Controller | NSI-MI controller with Ethernet interface |
| Measurement Workstation | Measurement workstation computer with large LCD monitor |
| Scanner Absorber | Absorber Kit 76 mm (3 in.) Pyramidal Cone & Flat |
| Probe | Open-ended Waveguide Probe(s) or optional broadband single or dual pol probe antennas |
| RF Cables | 20 GHz RF Cables |
| Rotary Joints | Qty. 2 - DC-26.5 GHz, (Phi, Pol) |
| Supported RF Devices | NSI-MI Receiver Subsystem or selection of Keysight, Rohde & Schwarz and Anritsu VNA's (contact NSI-MI for a complete list) |
| Power | 120-240 VAC switchable, 500 watts and 3-phase 240/480/575 VAC |
RAMS allows for CNF and SNF testing with adjustable probe radii and PNF testing with different AUT to probe separations. It also allows for PNF testing where the scan plane can be vertical or horizontal and is therefore ideal for custom measurement applications. The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from C-band to mm-Wave Bands. The system software runs on an Intel® based measurement workstation and provides automatic setup of scans based on measurement parameters and desired output. Measured data can be processed for far-field or holographic patterns yielding complete characterization of the antenna's performance. A single data set provides information on antenna gain, side lobe structure, beam pointing and cross polarization.