Home made antennas.

Discussion in 'FPV Systems' started by mozquito1, Aug 12, 2017.

  1. mozquito1

    mozquito1 0.4mm from the plate. WTF.

    IMG_20170812_163756474-1024x575.jpg
    The antennas I made in about an hour a piece. For less than £4 each.
    The only thing is they have not been tested yet. IMG_20170812_161110934-1024x575.jpg
    Apparently using 10 awg you do not have to have a wave trap. But it does have to be 0.4mm from the plate.
    IMG_20170812_164147297-1024x575.jpg
    So this is what I come up with for 0.4mm off the ground plate.
    IMG_20170810_184441094_HDR-768x1367.jpg
    I will have to test it on all channels & bands to see which is best. Same withe the omni. I have not got a printer so I had to dig on the info to draw a former template for 5.8ghz. If anyone wants the info I'll post it.
     
    GJH105775 likes this.
  2. mozquito1

    mozquito1 0.4mm from the plate. WTF.

    If you know what a wavelength is then you will know what a quarter wavelength is & this diagram will make sense. PhotoPictureResizer_170812_231537619-1024x768.jpg
     
    GJH105775 likes this.
  3. mozquito1

    mozquito1 0.4mm from the plate. WTF.

    d= diameter of wire
    L=length of the coil
    S=1/4 wavelength 11.8mm
    D=diameter of former 17.5mm
    a=space between coil & reflector plate
    R=reflector size 40-50mm
     
    GJH105775 likes this.

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