Compact antenna test range Mistral

Antenna characterisation and Compact antenna test range MistralA compact antenna measurement base MISTRAL: it functions in a controlled atmosphere and in the isolated environment of a shielded anechoic chamber (30 x 20 x 15.5 m).

The MISTRAL test was designed to verify radio-frequency performance of satellites on a system level.

Nowadays, Project MISTRAL incorporates the requirements corresponding to a compact base measurement performing tests of communications satellites.

This compact base allows for the creation, in small space, of a radio-frequency wave plane. This replicates the lighting conditions fan antenna in a remote field.

The test volume obtained is called "quiet zone" (5.5 m x 5 m x 8 m), inside, the electric field is uniform and homogeneous.

The satellite to be tested is placed on a 5-axis positioner for directing in a variety of ways.

3 types of test campaigns are therefore applicable in the compact range:

  • Antennas tests attempt to characterize antennas. The measurements are compared with respect to predictions made on software.

Examples of tests performed: Radiation pattern measurement / Gain Measurement / Decoupling / SWR

  • Satellites tests are mainly validation tests. The payload is validating while the antennas are retested in final configuration.

Examples of tests performed: Radiation pattern measurement / End to End measurement / Auto-compatibility Test

  • Large panel of industrial testing antennas
    • Radiation diagrams measurements
      • Up to 40 GHz
      • Positionning system: Az over El Az (+/-180°)
      • Rotating system: 360° around RF axis antenna
      • MIT acquisition system
    • Gain measurements
      • Gain measurement by substitution method (with reference source or a cable)
    • Ellipticity rate of antenna measurement
      • If circular polarisation
    • 'S' parameter
      • Radome attenuation

2, rond point Guillaumat CS 64356 31029 Toulouse Cedex