Title :
Measurements and Analysis of a Helical Antenna Printed on a Layered Dielectric Hemisphere
Author :
Latef, Tariq A. ; Khamas, Salam K.
Author_Institution :
Dept. of Electron. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
Radiation characteristics of a helical wire that is printed on the surface of a dielectric hemisphere have been studied theoretically and experimentally. Rigorous analyses have been performed using the method of moments (MoM). As expected, the dielectric hemisphere reduces the antenna´s operating frequency and bandwidth. Furthermore, it has improved the 3 dB circular polarization beamwidth considerably. Hemispherical structures that consist of one, or two, dielectric layers have been considered. The experimental and computed results are in close agreement with each other.
Keywords :
antenna radiation patterns; helical antennas; dielectric layers; helical antenna; helical wire; hemispherical structures; layered dielectric hemisphere; method of moments; polarization beamwidth; radiation characteristics; Antenna measurements; Antenna radiation patterns; Dielectrics; Green´s function methods; Helical antennas; Moment methods; Permittivity; Dyadic Green´s function; helical antennas; moment method; spherical antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2165491
