• All geometries and computational methods of GRASP are available for coupling calculation
  • Automatic calculation at several positions of receive antenna
  • Output of the complex coupling coefficient in amplitude and phase


  • Compute the amplitude and phase of the received interference signal coming from a near-by transmitter accounting for reflections in surrounding structural elements or antennas
  • Compute best antenna placement with minimum interference
  • Evaluate the true measured field for a reflector in a compact test range
  • Design optimum vertex plates in front-fed reflectors
  • Define feed array excitation coefficients

Calculate complex coupling ratio

Coupling is used to calculate the complex coupling ratio between two independent sources. Both the transmitting and the receiving source may be given as the standard sources in GRASP, feeds, feed arrays and current distributions.

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Analysis of influences of specific structure elements in Multi-GTD

Analyse interference between independent antennas

Coupling is used to calculate the interference between two antennas on e.g. a satellite by means of reflection and diffraction in the satellite body, the solar panels, other antennas and structural elements, all modelled by the standard geometrical elements in GRASP.

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Determine measured antenna pattern

An antenna can be measured under simulated far-field conditions by placing it in the aperture field from a parabolic reflector antenna. The aperture field approximates a plane wave with a quality that depends on both the reflector and the feed. Since it is not a perfect plane wave, the measured data will not be identical to the Antenna's plane-wave response. Using the coupling module, it is possible to predict consequences of the non-perfect plane wave illumination.

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Design vertex plate for centre-fed reflector

Perform coupling analysis to see how the feed-induced currents on the reflector is scattered back to the feed port. To insert a vertex plate in the central portion of the reflector will have the effect of tuning out the reflection, thus improving the feed VSWR.

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Contact us

Your project may be complex, but we keep things simple. If you have any questions about our software or services, or you need expert consultancy, we are here to help.

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