Isophoric Array Antennas with a Low Number of Control Points: a `Size Tapered' Solution

We propose a new architecture for array antennas able to achieve a high-gain performance by using a low number of elements and uniform-amplitude excitations. The solution is realized through a fast and deterministic design technique able to accurately emulate, by exploiting only the feeds' size as degree of freedom of the synthesis, 'ideal' continuous aperture sources fulfllling at best the assigned directivity requirements. The given theory is supported by numerical examples concerning the synthesis of isophoric direct radiating arrays devoted to a multibeam coverage of Europe from a geostationary satellite.

[1]  T. Isernia,et al.  Optimal Synthesis of Directivity Constrained Pencil Beams by Means of Circularly Symmetric Aperture Fields , 2009, IEEE Antennas and Wireless Propagation Letters.

[2]  T. Isernia,et al.  Solving Some Array Synthesis Problems by Means of an Effective Hybrid Approach , 2007, IEEE Transactions on Antennas and Propagation.

[3]  Ioan E. Lager,et al.  Sunflower Array Antenna with Adjustable Density Taper , 2009 .

[4]  Tommaso Isernia,et al.  On the generation of highly steerable pencil beams with isophoric sparse arrays , 2011 .

[5]  Tommaso Isernia,et al.  A DETERMINISTIC APPROACH TO THE SYNTHESIS OF PENCIL BEAMS THROUGH PLANAR THINNED ARRAYS , 2010 .

[6]  Robert J. Mailloux,et al.  Phased Array Antenna Handbook , 1993 .

[7]  A. Massa,et al.  Bayesian Compressive Sampling for Pattern Synthesis With Maximally Sparse Non-Uniform Linear Arrays , 2011, IEEE Transactions on Antennas and Propagation.

[8]  A. Massa,et al.  Complex-Weight Sparse Linear Array Synthesis by Bayesian Compressive Sampling , 2012, IEEE Transactions on Antennas and Propagation.

[9]  J.A.R. Azevedo,et al.  SHAPED BEAM PATTERN SYNTHESIS WITH NON-UNIFORM SAMPLE PHASES , 2008 .

[10]  O M Bucci,et al.  Density and element-size tapering for the design of arrays with a reduced number of control points and high efficiency , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[11]  Tommaso Isernia,et al.  Sparse arrays for satellite communications: from optimal design to realization , 2010 .

[12]  Piero Angeletti,et al.  Synthesis of circular and elliptical sparse arrays , 2011 .

[13]  Tommaso Isernia,et al.  On the Optimal Synthesis of Ring Symmetric Shaped Patterns by Means of Uniformly Spaced Planar Arrays , 2010 .

[14]  B. Fuchs.  Synthesis of Sparse Arrays With Focused or Shaped Beampattern via Sequential Convex Optimizations , 2012, IEEE Transactions on Antennas and Propagation.

[15]  Robert S. Elliott,et al.  A new technique for shaped beam synthesis of equispaced arrays , 1984 .

[16]  Tommaso Isernia,et al.  DIRECT RADIATING ARRAYS FOR SATELLITE COMMUNICATIONS VIA APERIODIC TILINGS , 2009 .

[17]  Tommaso Isernia,et al.  Shaped Beam Antenna Synthesis Problems: Feasibility Criteria and New Strategies , 1998 .

[18]  A. Bhattacharyya,et al.  Projection Matrix Method for Shaped Beam Synthesis in Phased Arrays and Reflectors , 2007, IEEE Transactions on Antennas and Propagation.

[19]  D. Pinchera,et al.  Advances in the Deterministic Synthesis of Uniform Amplitude Pencil Beam Concentric Ring Arrays , 2012, IEEE Transactions on Antennas and Propagation.

[20]  D. Pinchera,et al.  A Generalized Hybrid Approach for the Synthesis of Uniform Amplitude Pencil Beam Ring-Arrays , 2012, IEEE Transactions on Antennas and Propagation.