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Confusing Antenna

Happy New Year to you all.

I have a dead Yuneec and am looking at the radio which is confusing me.
They state the link is 2.4GHz for data and 5.8GHz for video.
There are two antennae on the radio. Both are the same dipole config.
The base element is 25mm and the main element is 85mm.
For 2.4 and 5.8 GHz this is very strange.

Anybody know antenna black magic who could explain this.

Thanks

Anthony

Tuning coils in the base element.

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