Development of tunable multi beam antenna for High Altitude Platform Station (HAPS) – Progress II

Abstract

In this paper, influence of Circularly Split Ring Resonators with its accompanying circular microstrip patch antenna are investigated. Proposing a 5850 to 7075 MHz band of working frequency, by means of microwave laminate RT/D 5880 (εr = 2.2 and thickness of 1.82 mm). The antenna is wholly organized into three layers consisting of circular copper sheet as ground plane, an undersized main radiator for where signal will pass through to resonate and ended with designed split rings entrenched on layer three laminate. All layers are separated by an air gap, simulated and optimized carefully using Microwave Studio of Computer Simulation Technology Suite (CST). Provided that, dimension of air gap, split ring quantity and entrenched split ring width are monitored as key controllers. Via transient solver, it presents corresponding Sparameter results and provides 3D view farfield. Thus demonstrating how each key controllers influence the antenna in terms of bandwidth, directivity, gain and efficiency produced. These works conclude that adaptation of split rings can enhance and improve this particular antenna.