Here are three 5.8GHz FPV helical antennas that were sent to me for review.
The bottom line is that all three antennas provide a very worthwhile gain over the basic omnidirectional skew-planar or clover-leaf antenna and all had quite a wide beam-width.
The standout winner was the antenna from Circular Wireless - but it's also the most expensive, by a significant margin so in terms of value, the other two rate very well also.
No losers in this shootout.
The 7/8 turn helical is from Circular Wireless
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The 5 turn helical was from Simon in the UK who sells them (as bignose13) via the FPVHUB website:
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The 3 turn helical was from ryan and can be seen (along with other CNC-made stuff) here:
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