Synthesis of the radiation pattern of retrodirective antenna arrays using the Particle Swarm Optimization algorithm

Magalhães, Marcelo Pereira; Engroff, Alian Moreira; Pereira, Lucas Santos; Heckler, Marcos V. T.; Girardi, Alessandro

doi:10.1109/imoc.2015.7369119

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…5a, 5c and 6a, larger gain can be achieved with beam switching with the expense of increasing the complexity of the feeder system, which must be adaptive so as to choose the correct pointing angle and the best set of excitation coefficients to be impressed at the array terminals. For this purpose, there is the need to use discrete components, such as PIN diodes [15,16] or circuits composed of phase shifters and variable gain amplifiers controlled by a logic unit [17]. By making a trade-off between system complexity and performance, the case of omnidirectional pattern has been chosen for fabrication and validation of the proposed approach for the analysis of installed performance.…”

Section: Pattern Synthesis For Omnidirectional Radiationmentioning

confidence: 99%

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Optimisation of antenna arrays installed on non‐conductive unmanned aerial vehicle

Yoshimoto

Schlosser

Heckler

2018

IET Microwaves, Antennas & Propagation

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This study presents the study of beamforming capabilities of arrays installed on a non‐conductive unmanned aerial vehicle (UAV). The main purposes of this study are the application of a beamforming algorithm by including the airframe in the optimisations and the study of simplifications of the aircraft model, so as to allow performing full‐wave simulations, even though the UAV is much larger than the operating wavelength. To validate the simplified electromagnetic model, antenna arrays have been designed and installed onto the UAV. Radiation pattern measurements demonstrate that the proposed simplifications yielded very good radiation pattern predictions and can be used as guidelines for simulation of other kinds of non‐conductive aircrafts.

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Section: Pattern Synthesis For Omnidirectional Radiationmentioning

confidence: 99%

“…By inspecting (16) and (17), it comes out that Z 12 ≅ Z 21 ≅ 0; hence the coupling between the arrays can be neglected in the feeder design. The submatrices Z 11 and Z 22 are approximately the same due to the symmetry of the model.…”

Section: Feeder Designmentioning

confidence: 99%

Optimisation of antenna arrays installed on non‐conductive unmanned aerial vehicle

Yoshimoto

Schlosser

Heckler

2018

IET Microwaves, Antennas & Propagation

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“…This is a focus of this paper: Digital switched beamforming using an ANN. Studies involving digital beam/null steering can be found in [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

An Artificial Neural Network Approach to Doa Estimation and Switched Beamforming in Rectangular Array Based Smart Antennas

Macharia¹,

Kibet²,

Kihato³

2019

PIER C

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Switched beamforming using electronic phase shifters is commonplace. Digital switched beamformers offer a premise of better performance than electronic phase shift switched beamformers. It is also worth noting that current unknown signal Direction of Arrival (DoA) estimation methods (commonly MUltiple SIgnal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT)) are generally computationally intensive. In this paper, signal DoA estimation and digital switched beamforming using aptly designed Artificial Neural Network (ANN) classifiers are looked into. Initially, signals detected at a rectangular receiving array are mapped onto a DoA through an ANN classifier. A second ANN classifier maps the selected DoA onto an optimal set of beamforming weights leading to an optimal switched beamforming reception pattern. The ANN classifiers' performance in DoA estimation and beamforming is tested over a variety of trials, yielding good results. The designed ANN beamformer premises to yield high-speed and accurate switched beamforming performance, most notably in large array systems. The ANN DoA estimator/beamformer can be easily adapted to nonuniform arrays wherein closed form DoA estimation/beamforming solutions are impractical. MATLAB software environment has been used as the main analysis tool.

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Flexible Beam Pattern Synthesis Method Based on Subarray for Satellite Communications

Liu,

Qi,

Feng

et al. 2024

2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring)

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Synthesis of the radiation pattern of retrodirective antenna arrays using the Particle Swarm Optimization algorithm

Cited by 3 publications

References 12 publications

Optimisation of antenna arrays installed on non‐conductive unmanned aerial vehicle

Optimisation of antenna arrays installed on non‐conductive unmanned aerial vehicle

An Artificial Neural Network Approach to Doa Estimation and Switched Beamforming in Rectangular Array Based Smart Antennas

Flexible Beam Pattern Synthesis Method Based on Subarray for Satellite Communications

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