FrSky Enhanced Receiver Antenna

Hardware help and support for the FrSky Taranis
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Scram
Posts: 43
Joined: Tue Jun 23, 2015 4:46 pm
Country: United Kingdom

FrSky Enhanced Receiver Antenna

Post by Scram » Sat Nov 14, 2020 2:41 pm

I have noticed that these are available and wonder how much they improve reception, especially as I'm now (when we are released from lockdown) flying an Xcalibur jet.

Also, these antennae are available in differing lengths. Can I use 2 different length antennae on 1 receiver (S8R)??


Scram
Posts: 43
Joined: Tue Jun 23, 2015 4:46 pm
Country: United Kingdom

Re: FrSky Enhanced Receiver Antenna

Post by Scram » Wed Nov 25, 2020 4:47 pm

I just decided to give it a try so bought some from T9. They did not turn out quite as I expected as the ends of the antennas did not show up in the T9 picture. This is what they look like:
20201124_132909_001.jpg
(2.28 MiB) Not downloaded yet
I thought it was worth it to try these as I was a little concerned with low RSSI from the installation in my Xcalibur jet and also my Mosquito.

I suspect the low RSSI readings may partially have been due to using a vertical antenna in the plane and having my Tx antenna horizontal. Although I have the 2nd antenna in the plane in a horizontal position, it may have been pointing straight at me when I did the range check. I had not realised the significance of the antenna orientations till recently.

I will recheck the range figures with the original antennas fitted and then compare with these enhanced ones under the same conditions and report back.

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jhsa
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Country: Germany

Re: FrSky Enhanced Receiver Antenna

Post by jhsa » Sat Nov 28, 2020 11:37 pm

Antennas inside the fuselage?
Any carbon parts around them?

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Scram
Posts: 43
Joined: Tue Jun 23, 2015 4:46 pm
Country: United Kingdom

Re: FrSky Enhanced Receiver Antenna

Post by Scram » Sun Nov 29, 2020 7:21 am

Yes, inside the fuselage which is all glass fibre. The canopy fits over and is all glass fibre.

Second testing with enhanced antennas done by mistake without fitting the canopy but I think that makes little difference.

The "enhancement" is nothing more than 25mm of brass tube over the antenna and soldered to the screen.

Tests conducted in my front garden, so not optimum conditions perhaps.

I tested first with the standard wire antennas fitted by using range check with the plane in the "worst" orientation - that is with the horizontal antenna pointing straight toward me. The other was vertical. I walked away until I got low RSSI warning at 44. Then took RSSI readings with the Tx antenna horizontal and vertical.

Then I turned the plane 90° so the Rx horizontal antenna was at 90° to me and walked back to the same position and recorded the RSSI figures for horizontal and vertical Tx antenna positions.

I then swapped out the original antennas for 1 x 150mm and 1 x 80mm antennas, the 150mm item being mounted vertically and repeated the testing. Results herewith.

Not very vigorous testing as lifting the Tx up and down produced better figures at higher positions. I tried to keep that constant.

Test site:
20201127_091635.jpg
(2.44 MiB) Not downloaded yet
Enhanced antenna mounting:
20201127_091520.jpg
(1.87 MiB) Not downloaded yet
Results:
Antenna Tests.jpg
Antenna Tests.jpg (83.23 KiB) Viewed 6 times


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