High-Efficiency Multi-Beam GRIN Lens with 2-D Wide-Angle Coverages
- Resource Type
- Conference
- Authors
- Song, Lizhao; Qin, Peiyuan; Zhang, Ting; Du, Jia; Jay Guo, Y.
- Source
- 2023 5th Australian Microwave Symposium (AMS) Microwave Symposium (AMS), 2023 5th Australian. :51-52 Feb, 2023
- Subject
- Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Microstrip antenna arrays
Refractive index
Prototypes
Microstrip antennas
Bandwidth
Apertures
Microwave theory and techniques
GRIN lens
high efficiency
multi-beam
- Language
Multi-beam gradient-index (GRIN) lenses are investigated to enable high aperture efficiencies and 2-D wide angular coverages. Metasurface composed of engineered elements with varied refractive indices is employed to implement the lens. Innovative methodologies are developed to calculate refractive-index distributions on the lens as well as the corresponding feed positions for multiple beams. A three-metal-layer element is developed to enable the variation of effective refractive index. Microstrip patch array antennas are designed as feed sources. Thirteen feed arrays are arranged on two focal arcs in xoz and yoz planes. A GRIN lens prototype is constructed, radiating multiple beams in a wide range of ±45° in two orthogonal planes with low scanning losses. The peak realized gain is 21.8 dBi with an aperture efficiency of 62.8%. The operating bandwidth is 22.2% from 12 GHz to 15 GHz.