Consider a lossless half-wave dipole in free space, with radiation resistance, R rad = 73 ohms, and
Question:
Consider a lossless half-wave dipole in free space, with radiation resistance, Rrad = 73 ohms, and maximum directivity Dmax = 1.64. If the antenna carries a 1-A current amplitude,
(a) How much total power (in watts) is radiated?
(b) How much power is intercepted by a 1-m2 aperture situated at distance r = 1 km away? The aperture is on the equatorial plane and squarely faces the antenna. Assume uniform power density over the aperture.
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a We use the definition of radiation resistance Eq 29 and write the radiated p...View the full answer
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