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Question about the antenna polarization concept

时间:04-10 整理:3721RD 点击:
I have a question about antenna polarisation. I have been learn when the electrical field is horisontal the magnetic field is vertical, now to the question. A good antenna for listen to shotwave bands are a horisontal assembled dipol, electrical field is horisontal. I have also seen that magnetic loop antenna are assembled horisontal for reception of the same signal. Here must be something wrong, but what?

You are correct, but said with your words may be understood wrong.
Let me the possibility to say: The H vector is perpendicular to E vector.

Applying the concept that I've wrote, to a large wire antenna (Short wave), for example, think to place the dipole horizzontally along N-S direction. Now the H filed are described by closed circles like wheeles rotating around an axis which is the dipole.

Of course you are receiving/transmitting along the E-W direction (also in the Zenith-Nadir direction).

If you use a loop antenna, once again think the loop as a week and place the axis along E-W direction.
Now the H filed lines generated (or received) on the top of the loop are polarized in the same direction of the dipole.
(also it receive/transmint vertical polarization)

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