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An analytical expression for current distribution, input impedance, and radiation power including higher order modes, is derived for a thin sectorial antenna embedded with lumped and distributed elements. To obtain the formulae, radiation power is analyzed in two ways using Chu's equivalent circuit and the multipole expansion method. By numerical estimation of the formulae for electrically small antennas...
Analytical expression including higher-order modes for a linear dipole antenna is derived with the multipole expansion and Chu's equivalent circuits. Current distribution on the antenna's conductor and loss caused by the radiation are consistently combined. Input power at the port is approximated to be guided totally on the conductor up to an effective antenna's radius, and to propagate in free space...
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