CST – Computer Simulation Technology

Low-Profile Corrugated Feeder Horn Antenna | Antenna Magus

Image of the Low-profile corrugated feeder horn antenna (Bulls Eye).

This interesting reflector feed antenna originated from optical studies which showed that sub-wavelength apertures in corrugated metallic films enhance transmission. By scaling the same concept to microwave frequencies, a very low-profile feeder antenna with approximately 20 dBi gain can be realized.

This very low-profile horn antenna consists of a waveguide terminated by a sub-wavelength aperture or slot in the center of a conducting plate with concentric periodic corrugations. By correctly designing the corrugations, the radiation pattern of the slot can be dramatically adjusted, resulting in a highly directed beam as shown in the following radiation pattern images:

 

Typical 3D radiation pattern.
Typical 2D radiation pattern....

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