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- Title
Metasurface-based ultra-lightweight high-gain off-axis flat parabolic reflectarray for microwave beam collimation/focusing.
- Authors
Silva, Sinhara R.; Rahman, Abdur; de Melo Kort-Kamp, Wilton; Rushton, Jeremiah J.; Singleton, John; Taylor, Antoinette J.; Dalvit, Diego A. R.; Chen, Hou-Tong; Azad, Abul K.
- Abstract
Ultra-lightweight deployable antennas with high-gain are pivotal communication components for small satellites, which are intrinsically constrained in size, weight, and power. In this work, we design and demonstrate metasurface-based ultra-lightweight flat off-axis reflectarrays for microwave beam collimation and focusing, similar to a parabolic dish-antenna. Our ultra-thin reflectarrays employ resonators of variable sizes to cover the full 2π phase range, and are arranged on the metasurface to realize a two-dimensional parabolic focusing phase distribution. We demonstrate a 30° off-axis focusing reflector that exhibits a measured gain of 27.5 dB at the central operating frequency of 11.8 GHz and a 3 dB directionality < ± 1.6°. Furthermore, we carry out full-wave simulations of the reflectarray, showing high gain of the beam focusing/collimation functionality, in good agreement with measurements. The demonstrated reflectarrays will enable low-cost, lightweight, and high-gain deployable transceivers for small-satellite platforms.
- Subjects
PARABOLIC reflectors; PARTICLE beam focusing; BEAM collimation; MICROWAVES; MICROSPACECRAFT
- Publication
Scientific Reports, 2019, Vol 9, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-019-55221-8