New Feeding Methods for Reconfigurable Slotted SIW Antenna Arrays for Fixed Frequency Beam Scanning applications

Two new different Reconfigurable slotted leaky-wave antennas (LWA) based on a substrate integrated waveguide (SIW) for fixed frequency beam-scanning capability are proposed in this paper. To improve the structures compactness, these designs are based on central rectangular slots located at the wide face, the first solution presents a feeding method by associated SIW holes via coplanar lines (CPL), on the other hand, the second feeding solution is provided by associated coupling with plated-through holes (PTH). Each feeder (CPL or PTH) is loaded with a pin diode to achieve the radiation angle scanning from −33° to +33° as an electronically controlled steerable SIW antennas for 25 GHz and 27 GHz.