Electronic Beam-Scanning Antennas

This chapter discusses the fascinating world of electronic beam-scanningBeam scanning antennas, where focused communication beams changes directionDirection based on the user requirements. We start by exploring the need for beam scanningBeam scanning and go through various methods, from classic frequency manipulation to the power of phased arraysPhased array. The chapter dissects the inner workings of phased arraysPhased array, where individual antennaAntenna elements collaborate to direct the beam in the desired directionDirection. The chapter then goes into electronic scanningElectronic scanning using discreteDiscrete devices, examining how switches and phase shiftersPhase shifter controls beam movement. The area of metamaterialsMetamaterial is also explored, showcasing their potential for ultra-fast and efficient beam steeringBeam steering. Finally, the chapter concludes by summarizing the advantages and future directionsDirection of these dynamic antennas, highlighting their transformative impact on WLAN communication, from enhanced directivity to improved interference mitigation.