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Maxwell2D: Offset phased array antenna

Dielectric constant distribution

The previous example of a phased array antenna utilized five dipoles oscillating in phase. Here the phase between each adjacent dipole differs by 30 degrees. The result is that the main lobe of energy is now offset from vertical. Most clear-air radars use this capability to scan electronically in different directions, and hence to estimate the three components of the wind.
Wikipedia link: Phased array

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.