CST – Computer Simulation Technology

Aperture Distribution Calculator | Antenna Magus

This calculator plots the approximate aperture and feed distribution of a typical axissymetrical parabolic reflector topology. The feed / aperture distribution is determined based on the the shape modifier (P) derived for the given focal length to diameter ratio (F/D), edge taper (ET) and aperture / feed distribution efficiency (ade / fde) [Rahmat-Samii].

The above image shows the effect of shape modifier P on the feed / aperture distribution.

The distribution at the feed is different to the distribution at the aperture, due to the properties of the main reflector. Depending on the F/D ratio of the dish, the graph below may vary. The aperture or feed efficiency is calculated relative to an 'ideal' flat distribution.

Image of aperture vs feed distribution

This calculator plots the approximate aperture and feed distribution of a typical axissymetrical parabolic reflector topology. The feed / aperture distribution is determined based on the the shape modifier (P) derived for the given focal length to diameter ratio (F/D), edge taper (ET) and aperture / feed distribution efficiency (ade / fde) [Rahmat-Samii].

The above image shows the effect of shape modifier P on the feed / aperture distribution.

The distribution at the feed is different to the distribution at the aperture, due to the properties of the main reflector. Depending on the F/D ratio of the dish, the graph below may vary. The aperture or feed efficiency is calculated relative to an 'ideal' flat distribution.

Image of aperture vs feed distribution

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