The Circular Eleven Antenna: A New Decade-Bandwidth Feed for Reflector Antennas With High Aperture Efficiency
Journal article, 2013

Future ultra-wideband (UWB) radio telescopes require UWB feeds for reflector antennas, and many new UWB feed technologies have gained substantial progress to satisfy the tough specifications for future radio telescope projects, such as the square kilometer array (SKA). It has been noticed that, different from traditional narrow-band horn feeds, all UWB feeds are non-BOR (Body of Revolution) antennas. Therefore BOR1, efficiency becomes an important characterization for the modern UWB feed technologies. We present a novel circular Eleven feed, constructed of "circularly" curved folded dipoles printed on flat circuit boards, in order to have high BOR1 efficiency at a low manufacture cost. The Genetic Algorithm (GA) optimization scheme has been applied to the design for achieving a low reflection coefficient. Simulated and measured results show that the circular Eleven feed has a reflection coefficient below -6 dB over 1.6-14 GHz and below -10 dB over 78% of the band, and an aperture efficiency higher than 60% over 1-10 GHz and 50% up to 14 GHz.

eleven feed

BOR1 efficiency

Aperture efficiency

reflector antenna

Author

J. G. Yin

Hunan University

Norwegian University of Science and Technology (NTNU)

Jian Yang

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Miroslav Pantaleev

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

Leif Helldner

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

IEEE Transactions on Antennas and Propagation

0018-926X (ISSN)

Vol. 61 8 3976-3984 6516574

Subject Categories

Telecommunications

DOI

10.1109/tap.2013.2263275

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Latest update

4/20/2018