7. (10%) Analyze the performance of a right-hand circularly polarized wave received respectively by linearly or circularly polarized antennae.

1.(20%) The radius of the solid inner conductor and the inner radius of the very thin outer conductor of an air coaxial transmission line are ri and ro, respectively. A uniform current I flows in the inner conductor and returns via the thin outer conductor in the other direction. The permeability of free space μ0 is H/m. Determine the stored magnetic energy per unit length of the line.

7. (10%) Analyze the performance of a right-hand circularly polarized wave received respectively by linearly or circularly polarized antennae.

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