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The synthesis of time-modulated linear arrays (TMLAs) is addressed in this work by considering the optimization of the switch-on instants of the radio-frequency (RF) switches used to modulate the static element excitations. It is shown that these additional degrees of freedom can be exploited to maintain some features of the radiation pattern more constant throughout the modulation period. Representative...
In this paper, an innovative approach for the reduction of the sideband level in time-modulated linear array has been presented. First, the proposed strategy has been mathematically justified showing that the SBL can be lowered by modifying the switch-on instants. Accordingly, a PSO has been used to minimize a suitable cost function quantifying the mismatch between the actual pattern features and...
This letter deals with the optimization of the switch-on instants of the radio-frequency (RF) switches used for the synthesis of time-modulated linear arrays (TMLAs). It is shown that these additional degrees of freedom allow one to increase the stability of the pattern instantaneously radiated by the antenna. Representative results, obtained by means of a particle swarm (PS) optimization, are reported...
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