The analysis and design of an omni-directional
antenna that functions over a very broad frequency band is
presented. Design guidelines for this antenna have been
derived using electromagnetic analysis software. ...
Jacobs, Ockert Botha; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan(Institute of Electrical and Electronics Engineers, 2011)
Quad-ridge horn antennas of various geometries
are considered as possible candidates for a wideband reflector
antenna feed. It is demonstrated that shaping the sidewalls of the
ridge horns significantly improves the ...
Jacobs, Ockert Botha; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan(Institute of Electrical and Electronics Engineers, 2013)
We present a quad-ridge horn antenna as a feed for
a reflector antenna for use in radio astronomy applications. The
antenna uses elliptically shaped sidewalls to limit the variation of
beamwidth over a wide frequency ...
Jacobs, Ockert Botha(University of Pretoria, 2012-08-14)
Reflector antennas used for radio astronomy require feeds that use the reflector surface as
efficiently as possible while maintaining low noise levels. The specifications of new radio
astronomy telescopes under development ...