Other Beam-Scanning Techniques

This chapter expands the horizons of beam-scanningBeam scanning technology in WLANs, beyond the realm of electronics. It begins by introducing mechanical beam scanningBeam scanning, exploring the classic approach of physically moving antennaAntenna components. We then delve deeper into two distinct methods: utilizing movable parts within the antennaAntenna and leveraging lenses to manipulate the beam path. The chapter further investigates the exciting potential of metasurfaces, engineered materials capable of deflecting and shaping electromagnetic wavesElectromagnetic waves to achieve beam steeringBeam steering. Additionally, the chapter also examines frequency-selective surfacesFrequency Selective Surface (FSS), another innovative approach using patterned structures to achieve beam control. Finally, the chapter concludes by summarizing the unique advantages and limitations of each method, highlighting their potential contributions to diverse WLAN applications.