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.
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.
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.
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.