Ultra-wideband 1-bit reconfigurable reflectarray antenna using tightly coupled elements

Xian-Jun Ma; Yong-Gang Zhou; Qi Luo

doi:10.1117/12.2685591

28 July 2023 Ultra-wideband 1-bit reconfigurable reflectarray antenna using tightly coupled elements

Xian-Jun Ma, Yong-Gang Zhou, Qi Luo

Proceedings Volume 12716, Third International Conference on Digital Signal and Computer Communications (DSCC 2023); 1271619 (2023) https://doi.org/10.1117/12.2685591
Event: Third International Conference on Digital Signal and Computer Communications (DSCC 2023), 2023, Xi'an, China

Abstract

Reconfigurable reflect-arrays (RRA) have received considerable interest recently. Although various RRA have been reported, most of them have relatively narrow bandwidth. Considering the importance of bandwidth in various wireless systems, it is highly desirable to design an ultra-wideband RRA with a simple configuration. This paper presents a 1-bit RRA with tightly coupled elements, which achieves ultra-wideband and promising beam scanning performance. In this work, firstly a wideband 1-bit RRA element consisting of two dielectric substrates perpendicular to each other is designed. Microstrip dipoles are printed on one substrate, while the other substrate is covered with copper and serves as the ground. In addition, the element design adopts the tightly coupled method, which results in ultra-wide bandwidth. The simulation shows the phases of the two states maintain a relatively stable difference within 180 ± 20° in the frequency range of 3-4.27 GHz and the relative bandwidth is 36.5%. Based on the broadband RRA element, a 30 × 30 RRA was designed and simulated. The simulation results show that the proposed RRA achieves a 1 dB gain bandwidth of 25% and promising beam scanning performance.

Citation Download Citation

Xian-Jun Ma, Yong-Gang Zhou, and Qi Luo "Ultra-wideband 1-bit reconfigurable reflectarray antenna using tightly coupled elements", Proc. SPIE 12716, Third International Conference on Digital Signal and Computer Communications (DSCC 2023), 1271619 (28 July 2023); https://doi.org/10.1117/12.2685591

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