NSI-700S-50球面近场量测系统
Model 700S-50 is an ideal system for measuring medium and low gain antennas up to 56 inches (1.4 m) indiameter and is well suited to cellular and PCS band base-station antenna testing. The 700S-50 uses a dualaxisphi-over-theta high accuracy stepper motor based positioning system with an adjustable extension footfor probe support. The system is constructed of modular high strength aluminum and can support loads of upto 165 pounds (75 kg). The location of the probe, theta and phi stages are fully adjustable to accommodatedifferent antenna sizes and mounts. This simple design is easy to assemble and can be quickly dismantled fortransport or storage.
The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phasepatterns from L-band to mmWave Bands. The Model 700S-50 includes NSI Antenna Measurement Software.
The system software runs on a Pentium based measurement workstation and provides automatic setup ofscans based on measurement parameters and desired output. Measured data can be processed for far-fieldor holographic patterns yielding complete characterization of the antenna’s performance. A single data setprovides information on antenna gain, side lobe structure, beam pointing and cross polarization.
The Model 700S-50 can be supplied with a variety of options to enhance system performance.
- Low Cost & Portable
- Full 360° Scan Area
- L-band to mmWave Measurement
- Automatic Electronic Alignment Capability
- Far-field, Holographic and Near-field Patterns
- Far-field Measurement Options Available
| SPECIFICATIONS | |
| Construction | Theta, phi, and pol rotation stages with “L” bracket (aluminum) |
|---|---|
| Drive system | Precision Stepper Motors |
| Scan Area | Full spherical; Phi/Theta - 360° |
| Maximum Antenna Load | 165 lb (75 kg) at 9” CG off set |
| Maximum Antenna Diameter: | 56 in (1.4 m) |
| Resolution | 0.01° phi and theta |
| Postition Repeatability | 0.03° RMS |
| Rotational Speed(Theta and Phi) | 10°/sec Theta, 20°/sec Phi |
| System Controller | NSI controller with parallel I/O, and serial interface. |
| Measurement Workstation | Measurement workstation computer with large LCD monitor. |
| Stepper Motor Power Amplifier | EIA 19” rack mount. (7” high x 14” deep) |
| Motor Cables | Quick-connect; 40’ (12 m) |
| Scanner Absorber | Absorber Kit (5” pyramidal cone) |
| Probe | WR90 Open-ended Waveguide Probe SMA (f) transition & Pyramidal absorber (3”) |
| RF Cables | 20 GHz RF Cables |
| Rotary Joint | Qty. 3 - DC-26.5 GHz, (Phi, Theta, Pol) |
| Supported RF Devices | NSI Panther Receiver Subsystem or selection of Agilent, Rohde & Schwarz and Anritsu VNA’s (contact NSI for a complete list) |
| Power | 100-240 VAC switchable, 47-63 Hz, 500 watts |
- Width - 82” (2.1 m)
- epth - variable
- Height - 75” (1.9 m)
- Weight - 582 lbs (264 kg); 750 lbs (337 kg) with full counterweights
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