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Shared aperture antennas are of great interest in modern wireless systems for communications, detection, location and remote sensing because of the need to realise multiple functions in a limited space. In this framework, aperture arrays of intermixed elements provide interesting performances in terms of hardware complexity, aperture efficiency and flexibility. However, each array of an interleaved arrangement usually shows a lower gain and a higher peak sidelobe level (PSL) than the corresponding non-interlaced design. Accordingly, numerically efficient design approaches able to control the sidelobe level of shared aperture antenna arrays are of great interest from the applicative viewpoint.
Satellite systems for wireless communications, biomedical instruments, antenna arrays for environmental monitoring and observation, reconfigurable polarization systems.



Interleaved Array Geometry For Pulse-Echo Application

Members of the ELEDIA Research Center have introduced analytical design approaches for the synthesis of fully-interleaved arrays (two-function of multi-function) with controlled sidelobes. Such methodologies are based on the exploitation of Almost Difference Sets (ADS). The enabling features of these binary sequences include

  1. their design efficiency, which owes to their analytical nature and their availability for arrangements comprising several thousands elements;
  2. their complementarity property, which means that the ADS predictable autocorrelation features (and relative sidelobe control properties) hold true for all synthesized beams;

The research activities carried out in this area have been focused on the introduction, study, and development of ADS-based design techniques for linear and planar interleaved arrays for several different applications (including biomedical imaging, pulse-echo arrays, and reconfigurable polarization systems).


Synthesized Pulse-Echo Beam Patterns With Different Steering Angles

Keywords: Thinned arrays, Almost Difference Sets, Space, Satellite Communications, Analytic Design

See Also
  • G. Oliveri, and A. Massa, "ADS-based array design for 2-D and 3-D ultrasound imaging," IEEE Trans. Ultrasonics Ferroelectrics Freq. Control, vol. 57, no. 7, pp. 1568-1582, Jul. 2010.
  • G. Oliveri, and A. Massa, "Fully interleaved linear arrays with predictable sidelobes based on almost difference sets," IET Radar Sonar Navigat., vol. 4, no. 5, pp. 649-661, Oct. 2010.
  • G. Oliveri, P. Rocca, and A. Massa, "Interleaved linear arrays with difference sets," Electronics Letters , vol.46, no.5, pp.323-324, March 4 2010
    doi: 10.1049/el.2010.2255
  • G. Oliveri, L. Lizzi, F. Robol, and A. Massa, "Polarization-agile ADS-interleaved planar arrays," PIER, vol. 142, pp. 771-798, 2013.