A Double Square Loop Antenna with 45° Step Beam Steering

Abstract

A novel form of Double Square Loop (DSL) antenna for beam adaptive applications is presented and analysed. The double square loop antenna consists of two identical square loops with a common centre placed at 45° to each other. The antenna is fed either at the eight external corners or at the eight mid-points of the inner track, which when excited one at a time steer the beam through 360° in steps of 45°. Also, the antenna can operate in four separate frequencies in UWB region with at least 500 MHz bandwidth, thus offering wideband multichannel operation which is useful to several communication standards.