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Reyna A.,Sistemas Industriales Automatizados | Reyna A.,Autonomous University of Tamaulipas | Panduro M.A.,Autonomous University of Tamaulipas | Romero G.,Autonomous University of Tamaulipas | And 3 more authors.
International Journal of Antennas and Propagation | Year: 2014

This document presents the synthesis of different two-dimensional time-domain antenna arrays for steerable energy patterns with side lobe levels. The research is focused on the uniform and nonuniform distributions of true-time exciting delays and positions of antenna elements. The uniform square array, random array, uniform concentric ring array, and rotated nonuniform concentric ring array geometries are particularly studied. These geometries are synthesized by using the well-known sequential quadratic programming. The synthesis regards the optimal true-time exciting delays and optimal positions of pulsed antenna elements.The results show the capabilities of the different antenna arrays to steer the beam in their energy pattern in time domain and how their performance is in frequency domain after the synthesis in time domain. Copyright © 2014 Authors.

Reyna Maldonado A.,Sistemas Industriales Automatizados | Panduro M.A.,Autonomous University of Tamaulipas
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields | Year: 2015

This research presents the synthesis of the concentric ring antenna arrays for a wide coverage pattern. The synthesis process is formulated as an optimization of the antenna excitations. Harmony search algorithm and particle swarm optimization are implemented for this optimization problem. The antenna array considers disk patches at the L-band. First, the synthesis regards the behavior of the antenna array modeled by the cavity model. Second, the mutual coupling is included by using the full wave simulation. This synthesis could be very useful in satellites with terrestrial global coverage. The obtained antenna array provides a wide uniform power density and reduces considerably the hardware complexity for a satellite antenna system. Copyright © 2014 John Wiley & Sons, Ltd. Copyright © 2014 John Wiley & Sons, Ltd.

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