Efficient electronic beam steering method in time modulated linear arrays

• Published in: IET microwaves, antennas & propagation antennas & propagation, 2020-04, Vol.14 (5), p.402-408
• Main Authors: Gassab, Oussama, Azrar, Arab, Dahimene, Abdelhakim, Bouguerra, Sara, He, Chong
• Format: Article
• Language: English
• Subjects: antenna radiation patterns; beam steering; efficient electronic beam steering method; efficient electronic beam steering technique; electronic steering process; genetic algorithm; genetic algorithms; linear antenna arrays; negative sidebands; nonsteerable array pattern; periodic time sequences; positive sidebands; power radiation; radiation power; Research Article; steered‐TMLA; time modulated linear array
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2019.0673

An efficient electronic beam steering technique in time modulated linear array (TMLA) is proposed, where the first positive and negative sidebands are utilised to implement the electronic steering process. In this technique, new periodic time sequences are used, in which a positive-ON, negative-ON, and OFF durations are utilised to obtain high sufficient steering in TMLA. Furthermore, it is shown that by using these time sequences, the non-steerable array pattern at the fundamental frequency and also the even sidebands can be eliminated and nulled to zero. In addition, the radiation power and the directivity of this proposed steered-TMLA are formulated in their closed form. The genetic algorithm is implemented to optimise the steered-TMLA by suppressing the remaining odd sidebands and increasing the power radiation at the first positive and negative sidebands.