NSI-700S-85球面近场量测系统
The NSI-700S-85 is a Theta/Phi Spherical Near-field Scanner with precision positioners. The system isdesigned for AUT testing from 10 - 500 GHz. The NSI-700S-85 uses a dual-axis high accuracy stepper motorbased positioning system with encoders, allowing for position triggering of the receiver to within 0.005°. Thescanner is designed to accommodate mm-Wave up and down converter modules to ensure maximum RFsystem stability. The mm-Wave modules are exchanged to cover the standard frequency bands from 50GHz and up, leaving the rack and cabling portion of RF sub-system in intact, making for a very modularand upgradable test system. Both positioners contain integrated RF rotary joints and slip ring assemblies tomaximize cable phase stability during testing. The Phi stage (lower) load capacity allows for the integration ofmicrowave probes in order to test antennas on chip, if needed.
The table below shows the maximum AUT sizes that can be tested in spherical near-field mode over theintended band of operation of the system. For cases where the probe to AUT distance (approx.. 500 mm) issufficient to allow for far-field testing, the software allows for far-field measurements to be conducted. Based onthe commonly used 2D^2/lambda rule, the maximum AUT size that can be tested in pure far-field mode is alsoshown the table below.
| Frequency [GHz] | Wavelength [mm] | LargestAUTDim [mm] forSNF | LargestAUTDIM [mm] forFF |
|---|---|---|---|
| 50 | 6.00 | 300 | 39 |
| 75 | 4.00 | 200 | 32 |
| 110 | 2.73 | 136 | 26 |
| 140 | 2.14 | 107 | 23 |
| 170 | 1.76 | 88 | 21 |
| 220 | 1.36 | 68 | 19 |
| 325 | 0.92 | N/A | 15 |
| 500 | 0.60 | N/A | 12 |
The system is delivered with a fully functional Panther 9000 or PNA-X based RF sub-system. Near-field probes and standard gain horns are delivered as part of the system. The software package delivered is the NSI2000 Professional edition. The system software runs on a dedicated measurement workstation and provides automatic setup of scans based on measurement parameters. Measured data can be processed for far-field or holographic back projection 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.
The system is constructed as a turn-key test system and is delivered fully assembled and aligned to minimize on-site installation effort.
- Scan Area 360° Phi and 360° in Theta
- 10 – 500 GHz Measurements (AUT Receive only)
- Automatic Electronic Alignment Capability
- Far-field, Holographic and Near-field Patterns
| 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 | 50 lbs (22 kg) |
| Maximum Antenna Diameter: | 20 in (0.5 m) |
| Resolution | 0.01° phi and theta |
| Postition Repeatability | 0.005° RMS with encoders |
| Rotational Speed(Theta and Phi) | 30°/sec |
| 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 - 94” (2.4 m)
- Depth - 60” (1.6 m)
- Height - 94 “ (2.4 m)
- Weight - TBD lbs (TBD kg)
永远超越客户的期待
ALWAYS GOES BEYOND CUSTOMERS' EXPECTATIONS