Poli, Lorenzo and Rocca, Paolo and Oliveri, Giacomo and Lizzi, Leonardo and Massa, Andrea (2011) Antenna Array Synthesis Through Time Modulation. [Technical Report]
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Abstract
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 [1] 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) [2] with a consequent reduction of the directivity of the pattern at the carrier frequency.
| Item Type: | Technical Report |
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| Subjects: | Uncategorized > TU Technical Reports and Publications |
| URI: | http://www.eledia.org/students-reports/id/eprint/444 |
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