If you ever damaged or cut the antenna on the 2.4Ghz Radio receiver in a crash, or chopped by spinning propellers, don’t worry. You might be able to fix it without buying a whole new receiver or antenna.
- An RX antenna is a pretty common coax cable, it has a layer of protective skin on the outside provides physical protection (plastic)
- And the next beneath the plastic there is a layer of metal wires which is used to shield the the wire. It prevents outside noise from getting in or out because it’s grounded
- Remove the shielding, you will find a thin wire, that’s your antenna! The length of this exposed wire without shielding determines the wavelength it’s tuned to
Making or repairing 2.4Ghz antenna has the same principle as 5.8Ghz antenna mentioned earlier. All you need to know is that the antenna needs to be 1/4 of the signal wavelength, which is 31.23mm for 2.4GHz. (put this in google “c / 2.4ghz / 4” if you don’t trust me :D )
Take a clean cut at the end of the broken antenna. Measure 31.23mm from the end, and carefully cut and remove the surface plastic layer, and the shielding. only leaving the centre wire exposed. It doesn’t matter how long the whole antenna wire is, as long as there is only 31.23mm wire at the end that has no shielding. A tiny bit longer or shorter, your antenna will still work, but you will lose some range, just remember to closer the better.
Beyond Repairable? Buy Replacement
Alternatively you can just buy these 2.4Ghz RX coax antenna as replacement, such as Frsky receivers. Such as this: http://bit.ly/frsky-2-4ghz-rx-antenna