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Maxwell2D: Satellite receiver

Dielectric constant distribution

This animation illustrates an offset dish antenna in the configuration of a domestic satellite receiver. An incoming plane wave from the satellite is focussed into a feed horn antenna, while radiation coming from other directions will be reflected in other directions and not picked up. The shape is exactly the same as an offset dish antenna used for transmission.
Wikipedia link: Satellite dish

Electric field animation

Time-averaged Poynting vector

This is an animation of the component of the electric field out of the plane of the page.The direction in which energy is travelling at any instant is proportional to the cross product of the electric and magnetic fields, known as the Poynting vector. The arrows show the direction of the Poynting vector averaged over the simulation, while the colours show its strength.