In a previous post I already wrote about the problem with the the default antenna mount position of IRIS. If you actually look carefully, you’ll notice three problems:
- When flipping over IRIS during a crash landing you can easily damage the antenna and/or Telemetry module
- You cannot un-/tighten the antenna without removing the top hull
- The antenna is directly connected to the transmitter board, passing through any physical tension and stress from the antenna to the board
These problems are all solved in the IRIS+, as the antenna is now located towards the side of the top hull, points downwards and is connected to the transmitter board via a cable (See Figure 1).
Unfortunately the IRIS-to-IRIS+ upgrade kit does not provide the material to move the antenna location of your existing IRIS. In this post I will show you, how you can easily relocate your IRIS transmitter antenna and thereby fix at least two of the three problems very easily.
Required materials and tools
- Small stripes of 3M Dual Lock Reclosable Fastener or a large roll of it
- (Optional) RP-SMA Male to Female Right Angle 90-Degree Adapter
After opening the top hull of IRIS, follow below steps to relocate your Telemetry module:
- Unscrew the three small plastic screws that hold the Telemetry module onto the plastic spacers
- Remove at least the rear plastic spacer
- Tape a stripe of 3M Dual Lock on the bottom of the Telemetry module
- Tape another stripe of 3M Dual Lock on the top shell, a little further to the back of where the Telemetry module used to be located (See Figure 2).
Make sure that you place the 3M Dual Lock, so that with the Telemetry module attached the following is possible:
- The locations is not too far to the right. You can still close the top hull.
- The locations is sufficiently towards the back. You can point the antenna downwards and you can un-/tighten the antenna without removing the shell.
- The Telemetry module does not touch the Pixhawk! This is very crucial, as you will otherwise introduce vibrations
- Close the top shell again
As a result you will be able to point the Telemetry antenna downwards and also un-/tighten the antenna (See Figure 3).
In this position the antenna will block easy access to the battery door. For improved usability place a 90 degree angled RP-SMA adapter between the Telemetry module and the antenna, pointing the base of the antenna out to the right side.