FDTD design of bifilar and quadrifilar truncated spherical helical antennas

Abstract

AbstractThe radiation characteristics of bifilar and quadrifilar truncated spherical helix antennas are analyzed using the FDTD method. Special attention is paid to the generation of a circularly polarized wave over a wide region above the antenna. By introducing the multiarm structure and changing the feeding geometry, the proposed antennas are capable of providing a symmetric, circularly polarized, broad‐beam radiation pattern, as well as a conical radiation pattern. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 246–249, 2001.