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  • zawy commented on recwap's instructable Quadcopter Range Hack8 months ago
    Quadcopter Range Hack

    These wifi 2.4 Ghz antennas needs to be pointed perpendicular to the copter. Pointed them towards the copter is the worst direction. The signal is sent out in a circle around the antenna. These means in flat houses with wireless routers, you point them up on the router and on the computer.For more than 100 meters, maybe use a 2.4 ghz yagi antenna pointed towards the quadcopter. You could spend $30 on the good one on amazon with good reviews. Do not get the cheap ones on ebay and amazon...they do not work as well as this instrucable's type of antenna. You can make your own if you can find a reliable source for the specs. Also, you probably want a half wave dipole (1/4 wavelength on each side, 3.125 cm for 2.4 GHz) as the yagi "driven" element (the dipole) instead of the type t...see more »These wifi 2.4 Ghz antennas needs to be pointed perpendicular to the copter. Pointed them towards the copter is the worst direction. The signal is sent out in a circle around the antenna. These means in flat houses with wireless routers, you point them up on the router and on the computer.For more than 100 meters, maybe use a 2.4 ghz yagi antenna pointed towards the quadcopter. You could spend $30 on the good one on amazon with good reviews. Do not get the cheap ones on ebay and amazon...they do not work as well as this instrucable's type of antenna. You can make your own if you can find a reliable source for the specs. Also, you probably want a half wave dipole (1/4 wavelength on each side, 3.125 cm for 2.4 GHz) as the yagi "driven" element (the dipole) instead of the type that is folded into a loop as the dipole ("folded dipole") because the half wave dipole is only 75 Ohm and the folded is 300 ohms and the transmitter is probably sending out constant voltage so lower ohms means more power transmitted, Watts=V^2/ohms. A 5 element yagi about 6" long might get you beyond your ability to see where it is flying. I am going to try this, along with making the quadcopter's internal antenna an external vertical dipole. The yagi should be oriented in the same direction.

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