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Monopole antenna above a hemisphere

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1 Author(s)

Antenna imaging by a finite ground is investigated analytically and numerically by considering a conical monopole antenna above a finite hemispherical ground of variable radius. The ratio Y_{t}/Y_{t \infty } of the terminating admittance of the antenna over a finite to that over an infinite ground is evaluated and plotted versus the ground radius for various monopole lengths. The plots provide a quantitative measure of the effectiveness of finite screens in imaging antennas.

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Antennas and Propagation, IEEE Transactions on  (Volume:19 ,  Issue: 5 )