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45 Degree Linear Polarization
Another example of linear polarization is the 45-degree slanted polarization shown below.
Notes:
  • One may view the slanted linear case as the superposition of two in-phase waves:  a vertically polarized plane wave and a horizontally polarized plane wave, both with equal magnitude.  Another way of thinking about this solution to the Helmholtz Wave Equation is simply a 45-degree rotation of the vertically polarized plane wave.  If the propagation medium is simple (isotropic) then any orientation in space should support this standard linearly polarized solution.
  • To receive maximum power from a radio plane wave with linear polarization, a whip antenna (like the FM radio antenna on your car) must be collinear with the direction of the electric field.  The whip antenna will not receive any power if it is oriented orthogonal to the electric fields.

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