Antenna design and analysis using characteristic modes
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Characteristic mode theory as formulated in the works of Garbacz and Turpin (1971) and Harrington and Mautz (1971), has been used in a variety of applications, including radiation and scattering analysis and pattern synthesis. In this work, the theory of characteristic modes was used to analyze the input impedance and currents of a two-arm spherical antenna. Suggestions were given on improving broadband behavior of an antenna based on the analysis.
[1] R. Garbacz,et al. A generalized expansion for radiated and scattered fields , 1971 .
[2] R. Harrington,et al. Computation of characteristic modes for conducting bodies , 1971 .
[3] S. Best. The radiation properties of electrically small folded spherical helix antennas , 2004, IEEE Transactions on Antennas and Propagation.