Dual-band virtual antenna array with time modulation in presence of position perturbations

This research presents a design approach of a dual-band virtual antenna array for future flying ad-hoc networks. The design approach consists in applying non-uniform positions and the time modulation technique as element excitations. The main problem is to generate the positions and time sequences t...

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Bibliographic Details
Published in:Telecommunication systems 2022-12, Vol.81 (4), p.539-547
Main Authors: Garza, Jesús C., Reyna, Alberto, Balderas, Luz I., Panduro, Marco A., García, Lourdes Y.
Format: Article
Language:English
Subjects:
Ad hoc networks
Aircraft
Algorithms
Antenna arrays
Antennas
Arrays
Artificial Intelligence
Business and Management
Computer Communication Networks
Directivity
Drones
Evolutionary computation
Ground stations
Harmonics
IT in Business
Microstrip antennas
Modulation
Multiple objective analysis
Optimization
Perturbation
Probability Theory and Stochastic Processes
Radiation
Sidelobe reduction
Sidelobes
Slot antennas
Telecommunications systems
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Summary:This research presents a design approach of a dual-band virtual antenna array for future flying ad-hoc networks. The design approach consists in applying non-uniform positions and the time modulation technique as element excitations. The main problem is to generate the positions and time sequences that permit low side lobes, as well as low harmonics in the radiation pattern of 2.4 GHz and 5.5 GHz. This problem is solved by utilizing the algorithm of differential evolution for multiobjective optimization. It is presented a virtual array with eight microstrip fed-slot antennas mounted on real drone bodies. The results are analyzed with a comparison among the patterns generated of a uniform array, the patterns generated of a non-uniform array and the pattern generated of a non-uniform array with perturbations in the element positions. The results show the good performance of the array even if the element positions are perturbed due to the sudden flight movements. It was achieved a side lobe level reduction of 7.36 dBi for 2.4 GHz and 5.8 dBi for 5.5 GHz with respect to the maximum directivity of the main lobe. And a harmonic level reduction of 7.7 dBi for both frequencies with respect to the maximum directivity of the main lobe.
ISSN:1018-4864
1572-9451
DOI:10.1007/s11235-022-00960-9