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Analog Beamforming Using Time-Modulated Arrays With Digitally Preprocessed Rectangular Sequences.

Authors :
Maneiro-Catoira, Roberto
Bregains, Julio
Garcia-Naya, Jose Antonio
Castedo, Luis
Source :
IEEE Antennas & Wireless Propagation Letters; Mar2018, Vol. 17 Issue 3, p497-500, 4p
Publication Year :
2018

Abstract

Conventional time-modulated arrays are based on the application of variable-width periodical rectangular pulses (easily implemented with radio frequency switches) to the individual antenna excitations. However, a serious bottleneck arises when the number of exploited harmonic beams increases. In this context, the modest windowing features of the rectangular pulses produce an inflexible and ineffective harmonic beamforming. The use of other pulses, such as sum of weighted cosines, partially solves these issues at the expense of introducing additional non-timing variables. We propose the discrete-time preprocessing of rectangular pulses before being applied to the antenna to accomplish an agile, efficient, and accurate harmonic beamforming, while keeping the simplicity of the hardware structure. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
15361225
Volume :
17
Issue :
3
Database :
Complementary Index
Journal :
IEEE Antennas & Wireless Propagation Letters
Publication Type :
Academic Journal
Accession number :
129948994
Full Text :
https://doi.org/10.1109/LAWP.2018.2797971