Mechanically pattern reconfigurable antenna using metasurface

Abstract

A radiation pattern reconfigurable antenna designed using metasurface (MS) is proposed in this study. The pattern reconfigurable metasurfaced (PaRMS) antenna is composed of a planar semi-circular MS placed directly atop of a planar circular patch antenna with a diameter of 70 mm (1.2l 0 ), making it compact and low profile. The main-beam direction of the antenna has an angle of 32°from the boresight direction. By rotating the MS around the centre of the patch antenna, the antenna beam can be steered continuously. The PaRMS antenna is studied and designed to operate at around 5.5 GHz. To verify the results of simulation, the PaRMS antenna is fabricated and measured. Results show that the antenna has an operating bandwidth from 5.4 to 5.6 GHz and measured peak realised gain of 7.2 dBi.

A Wideband Reconfigurable Antenna With 360° Beam Steering for 802.11ac WLAN Applications

“…Even though the designs using metasurface [12] and liquid metals [6] showed relatively smaller size and profile, the bandwidth, gain and difficulties in system-integration are the inherent drawbacks of these reconfigurable mechanisms. Notably, among other works using circular patch approaches, our design achieved a high gain of 10 dBi with the capability of 360° beam-scanning around zenith axis without using the conventional approaches of horn topologies or massive arrays.…”

“…As is shown in Fig. 7(b), the beam can be steered to 60° direction when turning on shorting vias groups DC biasing wires Battery 33.8 mm radius of the outer edge of the parasitic sector patch r 2 18.8 mm radius of radiating patch r 3 16 mm radius of the location of the shorting vias G1-G6 r 4 36.7 mm radius of the location of the shorting vias G7-G12 r 5 23.8 mm distance from inner edge of the joint stub to feed port r 6 30.8 mm radius of the location of the inner mounting screws r 7 19.5 mm distance of the DC wire hole to feed port r 8 9.1 mm radius of the inner hole on layer 3 r 9 45.2 mm radius of the outer edge of layer 3 r 10 43 mm radius of the location of the outer mounting screws r 11 21.2 mm distance from DGS outer edge to feed port r 12 9 4 0.85 mm radius of the holes for DC wires d 5 14.5 mm height of reflectors d 6 1.57 mm thickness of layer 1 d 7 0.8 mm radius of the shorting vias in G1-G6 d 8 0.5 mm radius of the shorting vias in G7-G12 d 9 0.5 mm thickness of inner ring in layer 2 d 10 1 mm slot width on layer 2 (spacing for PIN diode) d 11 0.6 mm slot depth on layer 2 (spacing for PIN diode) w 1 1.8 mm length of DC supply microstrip line (part 1) w 2 0.6 mm width of DC supply microstrip line w 3 2 mm pad width for shorting vias G7-G12 w 4 7 mm distance between two adjacent parasitic patches w 5 5 mm width of the stub connecting adjacent parasitic patches l 1 1.5 mm length of the dented slot (spacing for PIN diode) l 2 1 mm width of the dented slot (spacing for PIN diode) l 3 1.8 mm length of the dented slot (spacing for RF choke) l 4 0.6 mm width of the dented slot (spacing for RF choke) l 5 3 mm width of the dented slot (spacing for cap. and vias) l 6 3.1 mm width of the shape between two DGS slots (layer 2) l 7 3.9 mm pad length for shorting vias G7-G12 l 8 2 mm width of DC pad ...…”

Design optimization of a pattern reconfigurable microstrip antenna using differential evolution and 3D EM simulation‐based neural network model

“…The design complexity of reconfigurable pattern antennae are relatively high; however, there had been many studies that provides solutions for this challenging design problem such as usage of mechanical gears, modification of feeding systems phase, and modifications of surface currents via use of switches …”

Beam-reconfigurable crescent array antenna with AMC plane

“…One of the most recent and effective methods to improve the antenna performance is by incorporating metasurfaces in antennas . These metasurfaces include electromagnetic band‐gap (EBG), high impedance surface (HIS), artificial magnetic conductor (AMC), and reactive impedance substrate .…”

“…One of the most recent and effective methods to improve the antenna performance is by incorporating metasurfaces in antennas. 1,[19][20][21] These metasurfaces include electromagnetic band-gap (EBG), 22,23 high impedance surface (HIS), 22 artificial magnetic conductor (AMC), [23][24][25][26][27][28] and reactive impedance substrate. 29 The AMC is a type of periodic structure which has special electromagnetic characteristics and capable to work as a perfect magnetic conductor (PMC) or HIS.…”