Cloud Spider antenna for DJI FPV goggles by petruzzofpv

Last crawled date: 3 years, 1 month ago

The Cloud Spider is a super LHCP antenna for DJI FPV goggles, free for everyone who wants to build it at home.
This antenna has amazing performances (compared to DJI stock antennas), high bitrates and great penetration in many scenarios. Many kilometers with 50.8MB bitrate are now at disposal of FPV community!
A video of a first test is available here: https://www.youtube.com/watch?v=5yoh1of7eYQ
Material needed:

RG402 coax cablehttps://www.amazon.com/Eightwood-Coaxial-Semi-Rigid-Flexible-Jacket/dp/B07GDB9D9H/ref=sr_1_3?crid=52HTUKUJQHGR&dchild=1&keywords=rg402+coaxial+cable&qid=1612784031&sprefix=rg402%2Caps%2C243&sr=8-3


1.5mm copper wire for helical turnshttps://www.ebay.com/itm/Bare-Copper-Wire-Conductive-Copper-Wire-0-2mm-5mm-for-Electrical-Cable-Wire/184394395021?var=692092564794&hash=item2aeec32d8d:g:Y8IAAOSwK6RfLR~k


4 double-sided PCB copper discs (40mm diameter, thickness 1.2mm - I used my own designed PCB discs; you should cut your circular discs from a FR4 copper plate)https://www.ebay.it/itm/1pcs-Basetta-ramata-PCB-FR4-1-2mm-L-160mm-W-100mm-Rivestimento-rame/154088700180?hash=item23e066f914:g:DeYAAOSwXjFfYOjv


4 RP-SMA 90degrees connectorshttps://www.ebay.com/itm/RP-SMA-male-right-angle-90degree-connector-female-pin-for-RG402-Semi-Rigid-Cable/172553823760?hash=item282d026610:g:V8oAAOSw~AVYtSxr

Shrinking tube (5mm diameter)https://www.ebay.com/itm/HEAT-SHRINK-2-1-TUBING-ELECTRICAL-SLEEVING-CABLE-WIRE-HEATSHRINK-TUBE-ALL-COLOUR/273179741711?hash=item3f9ac80e0f:g:ckoAAOSwj2Ra4aD7
Assembly Instructions:
Print base and the two antenna plates
Print 4 helix towers
Print 4 circular disc blockers
The two plates fits perfectly into the base and are properly angled to have approx. 179 degrees of beam width with 3 turns helix antennas. Base is also designed to accommodate and hold in place the 4 disc blockers.
Build your helix antennas by soldering coax cable to copper disc and to helix coil, then insert the 4 antennas from the bottom of the plates. Put in place the 4 disc blockers and insert the two plates into the base (just press, no glue required at all). That's it!
You need to know, of course, how to build and tune a helical antenna for optimal performances.
Good starting points are available here: https://www.researchgate.net/publication/272348908_An_overview_of_helix_antenna_and_its_design
https://en.wikipedia.org/wiki/Helical_antenna
https://medium.com/@anil_21p/helical-helix-antenna-design-a0ca429e235
https://www.changpuak.ch/electronics/calc_12a.php
https://wifiantenna.wordpress.com/helical-antennas/
https://www.hindawi.com/journals/ijap/2019/8421809/
https://www.wifi-antennas.com/topic/31-helix-antenna/?page=2
http://openems.de/start/index.php?show=gallery
Enjoy performances of this great antenna...for FREE!
Ad Maiora!
PetruzzoFPV@gmail.com