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Thread: RHCP combined with LHCP: Why does this work?

  1. #11
    Quote Originally Posted by Channel 1 View Post
    What kind of antennas are you two using?

    Wayne
    Me:
    TX: Eachine Falcon cloverleaf LHCP
    RX: MOY FPV (BG cheapo) skew planar + DIY helical, both LHCP

    My friend:
    TX: Aomway skew planar RHCP
    RX: Stock Eachine VR D2 antennas (I guess it is skew planar RHCP) + planar.

  2. #12
    Instructor Pilot Channel 1's Avatar
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    Quote Originally Posted by Stuclik View Post
    Me:
    TX: Eachine Falcon cloverleaf LHCP
    RX: MOY FPV (BG cheapo) skew planar + DIY helical, both LHCP

    My friend:
    TX: Aomway skew planar RHCP
    RX: Stock Eachine VR D2 antennas (I guess it is skew planar RHCP) + planar.
    More than likely the axial ratio of your antennas is not up to par and neither is radiating a proper circular polarization as advertised.

    Purchase some antennas from a reputable manufacturer such as VAS and I'm willing to bet you will find a world of difference in the way they perform and isolate from RHCP to LHCP.

    Wayne
    Everybody loves a bunny.

  3. #13
    Engineer for Jesus Christ IBCrazy's Avatar
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    Quote Originally Posted by Stuclik View Post
    I will just dig this thread out - sorry for that. I recently started to fly minuquad with my friend. When one flies freestyle up to 500m away the other one watches his flight through his fpv goggles with his rx. Now I realized that he uses RHCP while I use LHCP. But we can see really no difference (well, if I have really bad signal behind trees he has dropouts). Strange... I really thought that the difference will be more noticeable.
    Two things make this happen: environment and axial ratio.

    Axial ratio has been discussed earlier, so I'll just explain environment:

    To 5.8GHz, every solid surface is a reflector. It is like a world of mirrors to light. Thus, the signal can bounce (effectively reversing propagation) and thus be received by the opposite rotation antenna. Mind you that how well the signal is received depends highly on axial ratio and where you happen to be flying. This is therefore highly subjective and difficult to understand as simply changing where you are standing might yield completely different results.

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

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