Poli, Lorenzo and Rocca, Paolo and Oliveri, Giacomo and Lizzi, Leonardo and Massa, Andrea (2011) Antenna Array Synthesis Through Time Modulation. UNSPECIFIED.
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In the last years, there has been a renewed interest towards the use of time‐modulated arrays (TMAs) thanks to the simplicity in reconfiguring the average pattern of the antenna just modifying the on‐off sequence controlling a set of radio‐frequency (RF) switches. TMAs have been originally introduced for the generation of low and ultra‐low sidelobe patterns for radar arrays  thus avoiding the implementation of impracticable excitation tapering with high dynamic range ratios. However, they haven’t received a large diffusion because of the power losses due to the generation of harmonic radiation at multiples of the time‐modulation frequency. As a matter of fact, the periodic modulation of the static excitations causes a shift of the radiated power in the sideband radiation (SR)  with a consequent reduction of the directivity of the pattern at the carrier frequency.
|Item Type:||Departmental Technical Report|
|Department or Research center:||Information Engineering and Computer Science|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7885 Computer Engineering|
Q Science > QC Physics (General) > QC661 Electromagnetic Theory
Q Science > QC Physics (General) > QC760 Electromagnetism
|Repository staff approval on:||08 Jul 2011|
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