Compact Ranges
Compact Antenna Test Range
700.00 MHz – 110000.00 MHz

A Compact Antenna Test Range (CATR) allows electrically large antennas to be measured at a significantly shorter distance than would be necessary in a traditional far-field test range. Compact ranges use a source antenna (feed) to radiate a spherical wave in the direction of a parabolic reflector, collimating it into a planar wave for aperture illumination of a Device under Test (DUT). It's lowest operational frequency is determined by the size of the reflector, its edge treatment and the absorbers. The two edge treatments available are serrated edge for general purpose applications, and rolled edge to achieve higher accuracy for special applications. Multiple-feed systems may be used to improve the far-field characteristics. A compact range test system also allows system level testing of a complete device architecture.

CATR Small, CATR Medium, CATR Large
Measurement capabilities
  • Gain and directivity
  • 2-D and 3-D radiation pattern
  • Beamwidth
  • Sidelobe levels
  • Radiation pattern in any polarization (linear or circular) and cross-polarization
  • Radome measurements
  • RCS measurements
  • Equipped with Tachometer for Speed Regulation & Control
  • EIRP and G/T (requires additional RF instrumentation)
Frequency bands
  • Small: 2 - 110 GHz
  • Medium: 700 MHz - 110 GHz
  • Large: 700 MHz - 110 GHz
Max. size of DUT
  • 10 to 100 kg for small size system
  • 100 to 1000 kg for medium size system
  • 1000 kg and more for large size system
Typical dynamic range
  • 50 to 80 dB, depending on antenna gain, frequency and RF instrumentation
  • Software