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http://hdl.handle.net/2183/35802 Enhanced Time-Modulated Arrays for Harmonic Beamforming
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R. Maneiro-Catoira, J. C. Brégains, J. A. García-Naya and L. Castedo, "Enhanced Time-Modulated Arrays for Harmonic Beamforming," in IEEE Journal of Selected Topics in Signal Processing, vol. 11, no. 2, pp. 259-270, March 2017, doi: 10.1109/JSTSP.2016.2627178
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[Abstract]: One of the primary features of time-modulated arrays (TMAs) is their ability to adapt their harmonic patterns to exploit the angular diversity of multipath wireless channels. In such a case, the TMA excitations must provide an adequate level of harmonic windowing in order to safeguard both the antenna efficiency and the signal-to-noise ratio at reception. In this work, we propose to time-modulate the array excitations with periodic sum-of-weighted-cosine (SWC) pulses rather than with the periodic rectangular pulses corresponding to the on-off switches of conventional TMAs. We show that how the larger flexibility of the SWC pulses allows for a more versatile design of the TMA harmonic radiation patterns without penalizing the array gain for each exploited harmonic.
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This version of the article has been accepted for publication, after peer review. The Version of Record is available online at: https://doi.org/10.1109/JSTSP.2016.2627178.
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