Parabolic Antenna Modeling

A parabolic reflector is formed from a shape known as a paraboloid.  Parabolic antennas are used as high-gain antennas for point-to-point communications, in applications such as microwave relay links that carry telephone and television signals for data communications, satellite communications and spacecraft communication antennas. parab1A parabolic shape has the property that paths taken from the feed point at the focus to the reflector and then outwards are in parallel, but more importantly the paths taken are all the same length and therefore the outgoing waveform will form a plane wave and the energy taken by all paths will all be in phase.

A typical parabolic antenna consists of a metal parabolic reflector with a small feed antenna suspended in front of the reflector at its focus pointed back toward the reflector as shown here. In CAD tool a large reflector can be modeled with the 2D axisymmetric formulation. In this model, the radius of the reflector is greater than 40 wavelengths and the reflector is illuminated by an axial feed circular horn antenna.

Antenna Design and Parameters

Antenna is designed for 9.3 GHz with diameter 1219 mm. Antenna focal point is 457 mm. Complete design is simulated FDTD electromagnetic simulator. Electric field data is shown below

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