The NSI-700S-85 is a Theta/Phi Spherical Near-field Scanner with precision positioners. The system is designed for AUT testing from 10 - 500 GHz. The NSI-700S-85 uses a dual-axis high accuracy stepper motor based positioning system with encoders, allowing for position triggering of the receiver to within 0.005°. The scanner is designed to accommodate mm-Wave up and down converter modules to ensure maximum RF system stability. The mm-Wave modules are exchanged to cover the standard frequency bands from 50 GHz and up, leaving the rack and cabling portion of RF sub-system in intact, making for a very modular and upgradable test system. Both positioners contain integrated RF rotary joints and slip ring assemblies to maximize cable phase stability during testing. The Phi stage (lower) load capacity allows for the integration of microwave 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 the intended band of operation of the system. For cases where the probe to AUT distance (approx.. 500 mm) is sufficient to allow for far-field testing, the software allows for far-field measurements to be conducted. Based on the commonly used 2D^2/lambda rule, the maximum AUT size that can be tested in pure far-field mode is also shown the table below.

Frequency [GHz]	Wavelength [mm]	Largest AUT Dim [mm] for SNF	Largest AUT DIM [mm] for FF
50	6.00	500	39
75	4.00	500	32
110	2.73	500	26
140	2.14	491	23
170	1.76	404	21
220	1.36	313	19
325	0.92	212	15
500	0.60	138	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.

DIMENSIONS

• Width - 94" (2.4 m)
• Depth - 60" (1.6 m)
• Height - 94 " (2.4 m)
• Weight - TBD lb (TBD kg).
  

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Please contact the NSI Sales department to order this product.