Compact high performance dielectric disk antenna for WiMAX application

Abstract

The simulation and measurement results relative to the radiation characteristics of dielectric disk antennas with the axial‐symmetric excitation are presented. The compact dielectric disk antenna with the −10 dB impedance bandwidth of Δf = 4.1 GHz and mono‐beam radiation pattern is manufactured and tested. The excitation more than one resonances and formation of the multi‐beam radiation pattern for antenna with substrate radius rs > 45 mm is explained by the appearance of standing waves along the substrate radius. The choice of relation between the dielectric disk radius and substrate height allows for designing a set of antennas operating from f = 5–21.77 GHz. At that the bandwidth and gain of antennas are changed within the limits 1.6 < Δf < 2.7 GHz and 4 < G < 6 dBi, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 580–584, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24980