Bebop antenna mod

Mods for Bebop, Bebop 2 and even the Skycontroller.
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jok178
Newcomer
Posts: 3
Joined: 29 Aug 2016, 06:15
Drone Type: Bebop

Bebop antenna mod

Post by jok178 » 29 Aug 2016, 11:53

G'day,

I have the Bebop 1 + controller.
I plan to fly it at an altitude of 5-8m out to 1-1.5km over swampland with 1.5m high grass. The flight video feed must be as clear as possible so I need to improve the drone side antenna. I intend to build a pair of external antennas tuned to a specific channel to improve the range and signal.

Should I use 2.4 or 5.8ghz?
Should they be clover or dipole?
Can I construct from the existing micro coaxial cables or if not what size is best?
And lastly if i mount them at the front will they interfere with the video or gps?

Thanks,
Chris

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solaris8x86
Thinking of bearings
Posts: 156
Joined: 23 Jun 2015, 17:02
Drone Type: Bebop 2

Re: Bebop antenna mod

Post by solaris8x86 » 17 Sep 2016, 02:18

jok178 wrote:G'day,

I have the Bebop 1 + controller.
I plan to fly it at an altitude of 5-8m out to 1-1.5km over swampland with 1.5m high grass. The flight video feed must be as clear as possible so I need to improve the drone side antenna. I intend to build a pair of external antennas tuned to a specific channel to improve the range and signal.

Should I use 2.4 or 5.8ghz?
Should they be clover or dipole?
Can I construct from the existing micro coaxial cables or if not what size is best?
And lastly if i mount them at the front will they interfere with the video or gps?

Thanks,
Chris


If you are in a rural area. And there's no other WiFi neighbor closed by. Then uses 2.4GHz at Channel 5, 6, 7 or 8 can reach the longest range possible due to a stock antenna has been tuned for this peak area of most-rich bandwidth allocated around these channels. Using Channel 1 or 13 will be significantly decreased of range due to VSWR value is poor.

Also, a flight lower than 8m above the tall grass is dangerous as the ultra sound sensor is being activated automatically below this altitude. Grass is a material that attenuates the ultrasound wave seriously. So your drone will fly lower and lower till it hits the grass. Ultrasound sensor will be cut off automatically and totally relies on the Air pressure sensor when the drone is above 8m. So it is more safe flying on the grass.
Advancing Bebop 2 to Router Mod with deep explanation: http://youtu.be/cumh4VZonVE
Bebop 2 Flight Record #0010 Finale (must watch): http://youtu.be/1pNyMSKwWaQ

jok178
Newcomer
Posts: 3
Joined: 29 Aug 2016, 06:15
Drone Type: Bebop

Re: Bebop antenna mod

Post by jok178 » 17 Sep 2016, 02:45

Thanks for the reply, since I posted that I have conducted some distance test flights at 5m above burnt out swampland.

https://youtu.be/4MuyTAAMRas for 2.4ghz

https://youtu.be/McB9ArWnBJ4 f0r 5.8ghz

These have shown me that I need to use 2.4ghz so I bought a skyboost amp for the skycontroller in that freq. Also research into the Fresnel zone has helped me understand that different altitudes can help boost the signal by (theoretically) two times, so I am building a chart of heights and distances.

This f-zone amplification can he seen in the 2.4ghz video when at 1.5kms I raise alt by a few meters and video drastically improves. I did the maths and the improvement was as I crossed from zone 1 into zone 2.

I understand that the drones alt may decrease during flight but thats ok, I will just adjust manually. I am still not sure which antennas I should use, have you tried modding them on a Bebop before with any success?

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