Circular Polarization — Lesson 7

[WeiHuang-kczf]

I think the video is 100% correct. At first I had the same issue thinking how left and right hand rotation are opposite; however, it is a illusion effect from our eye, if we move to other angle to look, we have to look at the y-z plane, and than while wave propagate though +x, we can see it are on the same curling direction of right

[kjhstpd]

I think the last two simulations for left and right hand rotation are other way around.

[SalahuddinTariq-vx]

The animation on 1:14 is very confusing. When I point the thumb of my right hand in the direction of the X-axis (arrow, top left of the monitor), my right-hand fingers do not curl in the direction of rotation as shown. They curl in the clockwise direction and not the anti-clockwise direction.

[carmelpule]

I would say that the rotating diagram shown at 0:17 needs some discussion, I believe that there is nothing in the transmission medium that would ROTATE the E/B wave after they are launched into the atmosphere and a vertical dipole launching an E wave vertically and a B wave horizontally the E and B wave will keep their polarisation that was given to them at the transmitting antenna,
The same applied to a circular polarised wave, It is the two phased antennas at the transmitter which will rotate the polarisation of each individual E/ B vector but one launched in the medium, of transmission each vector will hold that particular polarisation which was allotted to it at the antenna and there is no further rotation as the diagram shown at 1:35 could suggest. That diagram should be pushed not rotated, That helix is not a case of a drill helical bit rotating in a rotating power drill it, and once launched the the helix is a pushed forward and not a rotating helix. As far as the the receiver is concerned with a pushed helix the frequency of reception will be that of the transmitter but if the helix is as shown rotated and pushed ahead then the frequency at the receiver could be doubled

If one assumes that the wave is represented by say E= Eo (e^--jkz) ( e^jwt) one could finish up having zero rotation or double rotation ! to keep the frequency at the transmitter that formed helix at the transmitter should be pushed and translated only but never rotated as shown in the diagram.

[bigdave]

okay so the last two examples are clearly inverses of each other

[hopolo]

0:27 hogwash. the previous graphic labeled the blue vectors as the magnetic field, now you're claiming this is somehow another electric field? even if that were the case, it wouldn't create nor explain a circular wave.