Cylindrical Near-Field Systems - NSI-MI

Cylindrical Near-Field Systems - NSI-MI

The CNF method offers the ability to acquire data over a vertical cylinder surrounding the DUT. This type of system offers superior angular coverage than the PNF geometry but does not offer full sphere coverage like the SNF approach. CNF is well-suited to testing fan beam antennas, or to measure the backlobes of antennas. Care must be taken to ensure that minimal radiation is directed toward the open top and bottom of the cylinder.
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Small cylindrical near-field measurement systems are ideal for measuring broad beam (azimuth) antennas with apertures less than 1.5 m (5 ft), making them ideal for testing stacked linear arrays. The scanners consist of a vertical probe tower with up to a 1.5 m (5 ft) travel, high capacity stepper motor-based azimuth positioner, control computer, software, and cabling. The high capacity probe carriage can accommodate probes as low as S-band including optional roll and translation stages. This simple design is easy to assemble and align, accurate, and can be dismantled for transport or storage within one working day.

Features
  • Low cost
  • 360° x 0.9 m (3 ft) to 1.5 m (5 ft) cylindrical scan area
  • High accuracy y-linearity 0.125 mm (<0.005”) RMS
  • Precision rack and pinion drive
  • S-band to mmWave measurements
  • 725 kg (1,595 lb) load capacity azimuth positioner
  • Far-field, near-field, and holographic patterns

Medium cylindrical near-field measurement systems are ideal for measuring broad beam (azimuth) antennas with apertures less than 3.7 m (12 ft) making them ideal for testing stacked linear arrays. The scanners consist of a vertical probe tower with up to a 3.7 m (12 ft) travel, high capacity stepper motor-based azimuth positioner, control computer, software and cabling. The high capacity probe carriage can accommodate probes as large as a WR1500 including optional roll and translation stages. This simple design is easy to assemble and align.

  • 360° x 1.8 m (6 ft) to 3.7 m (12 ft) cylindrical scan area
  • High accuracy y-linearity 0.10 mm (<0.004 in.) RMS to 0.076 mm (<0.003 in.) RMS
  • Precision rack and pinion drive
  • L-band to mmWave measurements
  • 725 kg (1,595 lb) to 1,996 kg (4,400 lb) load capacity azimuth positioner
  • Far-field, near-field, and holographic pattern
Large cylindrical near-field measurement systems are ideal for measuring broad beam (azimuth) antennas with apertures less than 15.8 m (52 ft) making them ideal for testing stacked linear arrays, cellular, and PCS antennas as well as higher frequency antennas with larger apertures. The scanners consist of a vertical probe tower with up to a 16.0 m (52 ft) travel, high capacity stepper motor based-azimuth positioner, control computer, software and cabling. The high capacity probe carriage can accommodate probes as large as the WR1500 including optional roll and translation stages.
  • 360° x 5.5 m (18 ft) to 16.0 m (52 ft) cylindrical scan area
  • High accuracy y-linearity 0.10 mm (<0.004”) RMS
  • Precision rack and pinion drive
  • L-band to mmWave measurements
  • 2,636 kg (5,800 lb) load capacity azimuth positioner
  • Far-field, near-field, and holographic patterns