Time-Modulated Arrays With Haar Wavelets
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Time-Modulated Arrays With Haar WaveletsDate
2020-11Citation
R. Maneiro-Catoira, J. Bregains, J. A. Garcia-Naya, y L. Castedo, “Time-modulated arrays with Haar wavelets”, IEEE Antennas Wirel. Propag. Lett., vol. 19, núm. 11, pp. 1862–1866, 2020.
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https://doi.org/10.1109/LAWP.2020.2986832
Abstract
[Abstract]. Time-modulated arrays (TMAs) can effectively perform beamsteering over the first positive harmonic pattern by applying progressively delayed versions of stair-step approximations of a sine waveform to the antenna excitations. In this letter, we consider synthesizing such stair-step sine approximations by means of Haar wavelets. Haar functions constitute a complete orthonormal set of rectangular waveforms, which have the ability to represent a given function with a high degree of accuracy using few constituent terms. Hence, when they are applied to the TMA synthesis, employing single-pole double-throw switches, such a feature leads to an excellent rejection level of the undesired harmonics as well as a bandwidth greater than that supported by conventional TMAs with on-off switches.
Keywords
Beamsteering (BS)
Haar wavelets
Time-modulated arrays (TMAs)
Haar wavelets
Time-modulated arrays (TMAs)
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https://doi.org/10.1109/LAWP.2020.2986832
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ISSN
1536-1225