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An innovative approach for reducing grating lobes appearing when the inter-element spacing of an UWB linear array is greater than half-wavelength is presented. The main innovation of the proposed new design methodology is related to the fact that the positions of the array elements are left unchanged in the direction of the axis of the array (thus not affecting the gain of the pattern), while they...
The synthesis of multi-frequency sparse linear antenna arrays is addressed through the use of an innovative technique based on the multi-task Bayesian Compressive Sensing (MT-BCS). The definition of the array element locations as well as the values of the excitation weights are optimized such to generate the same reference beam pattern at all the desired frequencies. Preliminary results are reported...
A deterministic approach for the design of thinned arrays is numerically assessed when dealing with extremely large apertures. The method exploits the features of analytical binary sequences with known autocorrelation properties called almost difference sets (ADSs) to efficiently synthesize arbitrary-sized thinned layouts. Performances and computational issues of the ADS technique are analyzed also...
An innovative methodology for the design of correlator arrays for radio astronomy applications is presented. The technique exploits the low correlation properties of Almost Difference Sets (ADSs) to synthesize open-ended “Y” array configurations with maximum u-υ coverage both in snapshot and in tracking observations. A preliminary numerical validation is presented to assess the performances of the...
An analytical methodology is proposed for the synthesis of multi-beam arrays with predictable sidelobes. The methodology extends the interleaved architectures derived from Almost Difference Sets to allow more than two independent functions to be supported by the same aperture. A preliminary numerical assessment is presented to assess the features and potentialities as well as limitations of the proposed...
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