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Use l'Hospital's rule to find the limiting value of the pattern function for a half-wave dipole as θ ⇒ 0. 2. A loop antenna consists of 15 turns of 1 mm thick copper wire wound on a ferrite core with a radius of 1 cm and with relative permeability of 40. The frequency is 100 MHz. Neglecting losses in the ferrite, calculate the antenna efficiency

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