Title :
Measurements and Analysis of a Probe-Fed Circularly Polarized Loop Antenna Printed on a Layered Dielectric Sphere
Author :
Yasin, M. N Mohd ; Khamas, Salam K.
Author_Institution :
Sch. of Microelectron. Eng., Univ. Malaysia Perils, Perils, Malaysia
fDate :
4/1/2012 12:00:00 AM
Abstract :
Radiation characteristics of a probe-fed open circular loop antenna are presented when the antenna is printed on a layered dielectric sphere. A smaller parasitic circular loop has been incorporated in the configuration to enhance the circular polarization (CP) bandwidth. The structure has been analyzed rigorously using the method of moments (MoM), where the sphere has been represented using the spherical dyadic Green´s function (DGF). The computation efficiency has been enhanced using asymptotic extraction as well as closed form integrations to compute the MoM impedance matrix elements. The computed results are in close agreement with those obtained from measurements.
Keywords :
Green´s function methods; antenna radiation patterns; electromagnetic wave polarisation; impedance matrix; inhomogeneous media; loop antennas; method of moments; microstrip antennas; MoM impedance matrix element; asymptotic extraction; circular polarization bandwidth; layered dielectric sphere; method of moments; parasitic circular loop antenna; printed antenna; probe-fed open circularly polarized loop antenna; radiation characteristics; spherical dyadic Green´s function; Antenna measurements; Antennas; Bandwidth; Dielectrics; Impedance; Moment methods; Probes; Circular polarization; dyadic Green´s function; loop antennas; moment method; spherical antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2186259
