Category:Drones/Receiver

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Receiver

Description

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Antennas

Placement

3D printed support

Protect-antenna-3d-printed-support.png

zip ties / heat shrink

A possible option is to use zip ties and heat shrink to protect your radio receiver antennas, as follows:

Protect-antennas-zip-ties-heat-shrink.png

Here is what it looks like:

Protect-antennas-zip-ties-heat-shrink-photo.jpg Protect-antennas-zip-ties-heat-shrink-photo-2.jpg

You can also do like MrSteele:

Protect-antennas-zip-ties-heat-shrink-option2-schema.png

Here is what it looks like:

Protect-antennas-zip-ties-heat-shrink-option2.png Protect-antennas-zip-ties-heat-shrink-option2-1.png

Repair antenna

It happens frequently that your antennas are cut by the propellers (e.g. after a crash). To repair an antenna, all you need to do is to remove the shield protecting the antenna to leave the antenna wire exposed with a specific length, given by the following formula:

speed of light (in m/s) / freq (in Hz) / 4 

where

  • speed of light: 299,792,458 m/s
  • freq: 2.4 GHz = 2,400,000,000 Hz

Applied to 2.4Ghz radio signal, it gives us:

299,792,458 / 2,400,000,000 / 4 = 0.03122838104 m = 31.23 mm

The antennas on the Frsky X4RSB receiver have the following layers:

Frsky-x4rsb-antenna-shield.png

Here is how it should look like:

Frsky-x4rsb-antenna-shield-repaired.png

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Keywords: drones quadcopter fpv racing receiver



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