Interoperable, ultra-low profile, high-gain satcom on the move

Far-field results – from the lab

 

We obtain true far-field results for the full array using Hanwha Phasor’s spherical near-field scanner.

Designed and built in-house, this anechoic chamber is used to characterise the performance of antennas under test in the near-field before processing the data to generate accurate far-field radiation patterns in the lab.

  • A turntable rotates the antenna in azimuth
  • The near-field probe transverses an arch in elevation to acquire power and phase information across a full hemisphere
  • We build up a pattern of contributions from any one of the 3,600 patch antennas that make up, say, our classic six-module aperture array. The result is a 3-D plot of those patterns in aggregate.

We also measure gain, co- and cross-polar levels, 3dB beamwidth and sidelobe level characteristics.

The frequency range is 10-18 GHz and elevation +/- 100°.

Our spherical near-field scanner is used for R & D today but is being prepared for the production environment, ready to calibrate our arrays in line with customer requirements and for quality control and diagnostics.

Hologram Phase X mapped to array patches

Ex – Amplitude [db]

Ex – Phase [deg]

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