Title :
Pattern analysis of uniform circular array
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Canada
fDate :
4/1/2004 12:00:00 AM
Abstract :
The radiation characteristics of a uniform circular array with linear centrally-fed dipole elements, used for smart antenna systems, are analyzed in this paper. The radiation patterns of the array and the gain of the array over a single element are derived based on the thin-wire model. Numerical simulations using the thin-wire model and the method of moments (MoM) have been conducted and compared for a half-wavelength dipole array. Simulations using the MoM demonstrate that the wire diameter of the elements has no significant effect on normalized azimuthal and elevation patterns for a given pattern design. Normalized azimuthal patterns by the thin-wire model and the MoM are in good agreement with each other, while normalized elevation patterns by the thin-wire model are inaccurate since mutual coupling is not considered in the model. Wire diameter affects the radiation resistance and thus determines the amplitude of the radiation field.
Keywords :
adaptive antenna arrays; antenna radiation patterns; method of moments; MoM; azimuthal pattern; dipole elements; elevation pattern; method of moment; mutual coupling; radiation characteristic; radiation pattern; smart antenna systems; uniform circular array; Adaptive arrays; Antenna arrays; Antenna radiation patterns; Antennas and propagation; Dipole antennas; Linear antenna arrays; Mutual coupling; Pattern analysis; Transmitting antennas; Wire;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.825802