Efficient Design of a Novel Multibeam Antenna Using Scalar Metasurfaces
Mounia Djoudi,
Mohamed Lamine Tounsi,
Julien Sarrazin and
Massimiliano Casaletti
This paper presents a simple and innovative approach to the design of multibeam scalar metasurface antennas. The proposed method, based on the equivalent currents on the antenna aperture, allows beams to be radiated in arbitrary directions with the desired polarization. Unlike other solutions available in the literature, this approach uses scalar metasurfaces, which are much simpler to implement than tensor ones, and also do not require optimizations through ad hoc developed numerical analysis tools. Analytical design equations based on the physics are introduced, and a block diagram for the designs of such antennas is presented. Two antenna designs are presented, and the corresponding numerical results demonstrate the flexibility of the presented method. A prototype of a two-beam antenna with orthogonal circular polarizations, operating at 20 GHz, was fabricated and measured. These results confirm the effectiveness of scalar metasurfaces in creating multibeam patterns, paving the way for various applications in advanced communication systems.
