Single-Layer Sequential Rotation Network in Gap Waveguide for a Wideband Low-Profile Circularly Polarized Array Antenna
Miguel Ferrando‐Rocher, José I. Herranz-Herruzo, Alejandro Valero‐Nogueira, Bernardo Bernardo-Clemente
Abstract
A low-profile circularly-polarized sequential rotation fed 4×4 array antenna working in the Ka-band from 27.5 GHz to 31 GHz is presented. The particularity of the antenna lies in its single-layer sequential rotation feed network implemented in a bed of nails using a combination of groove and ridge gap waveguides. The basic radiating element is one slot loaded by a simple coffee-bean-shaped parasitic element on top. Experimental results show an antenna matching below –10 dB in a 13.6% bandwidth and a measured axial ratio below 1.3 dB in the desired band.
Topics & Concepts
WidebandOpticsRotation (mathematics)Bandwidth (computing)Axial ratioCoaxial antennaPhysicsCircular polarizationAntenna (radio)Microstrip antennaMicrostripTelecommunicationsComputer scienceGeometryMathematicsMicrowave Engineering and WaveguidesAntenna Design and AnalysisAntenna Design and Optimization