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Unformatted text preview: is total length of the wire. 3. Consider a plane wave with the magnetic field given by H = e j z j x 4 / ˆ ) 1 ( ˆ e-jky (a) What is the polarization of the wave (LP, CP, or EP)? (b) What is the sense of rotation (left- or right-hand), if any? (c) Determine the associated electric field. 4. Show mathematically that any linearly polarized (LP) wave can be written as a linear superposition of two circularly polarized (CP) waves traveling in the same direction but with having opposite senses of rotation. 5. Discuss why an isotropic antenna (same radiation intensity in all directions) cannot be realized. Hints: (1) Recall that the radiated far-field has a polarization transverse to the direction of propagation. (2) Invoke the so-called “hairy-ball” theorem (search the literature on this)....
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This note was uploaded on 10/21/2010 for the course ECE 613 taught by Professor Teixeira during the Fall '10 term at Ohio State.
- Fall '10