By Topic

Design and Implementation of a Closed Cylindrical BFN-Fed Circular Array Antenna for Multiple-Beam Coverage in Azimuth

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Nelson Jorge G. Fonseca ; Antenna and Sub-millimetre Wave Section, European Space Agency, Noordwijk, The Netherlands

This paper describes a beamforming network well adapted to produce evenly distributed multiple-beam coverage over a full 360° angular range in azimuth. This structure is very simple, flexible, and compatible with low-cost manufacturing processes such as printed technology. The proposed design is based on balanced power dividers and combiners arranged in such a way to feed a sector of a circular array antenna with Gaussian amplitude distribution and in-phase signals. The first characteristic provides control on the radiation pattern shape, including main lobe shape and sidelobe level, while the second ensures stable beam pointing over a wide frequency range. The proposed azimuth beamforming network is described, and a specific design in microstrip technology is presented with a center frequency at 6 GHz. Simulation results are supported by the measurement of several prototypes. In particular, two designs including the circular array antenna are compared to investigate the impact of the circular array antenna radius on radiation patterns. Despite the assumptions, good correlation is found between simulation and measurement results, thus confirming the properties of the proposed beamforming network concept. Integration of phase controls in the feeding network and its impact on the overall antenna efficiency are also discussed.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:60 ,  Issue: 2 )