Hello GoPro Karma Pilot!
Join our Go Pro Karma community today!
Sign up

GoPro Karma Controller Antenna Upgrades

bfarnam

Member
Joined
Jul 29, 2019
Messages
5
Reaction score
6
Age
49
Location
St. Louis Missouri
Does anyone happen to have the spec sheet for the GoPro Karma controller RangePro antenna from ITElite?

I am specifically interested in the center frequencies, the design gain, and the max power handling.

I am trying to decide if this is worth it or should I design my own external antenna. The internal antenna, a TAOGLAS WLP.25 (aka WLP.2450.25.4.A.02) is a 2.4~2.5GHz Ceramic Patch Antenna with the following specifications on a 50mm by 50mm ground plane:

Frequency Range : 2.44GHz ~ 2.525GHz
Frequency (Center/Band) : 2.4GHz
VSWR : 2 max
Gain : 5 dBic MAX

Unfortunately the antenna is mounted with out such a large ground plane and its gain will be greatly affected. The antennas are very very cheap so making the proper PCB with a 50mm by 50mm ground plane (x2) to get the proper gain values is actually not very hard. However, the most I could achieve would be a gain of 5 dBic. So if the RangePro is not much higher than that, why would I bother?

There are some technical considerations. For instance the internal antennas are canted outward to improve the horizontal axis while the RangePro is 90 degree flat. What you lose in horizontal you hopefully acquire in additional gain.

Just some thoughts for the technical in here: There is a near drop in replacement inside the controller. The Abracon APAKN2504-S2448-T has very similar ratings with a 7 dBi max gain with an identical footprint. However, the Taoglas offers a 85 MHz bandwidth while the Abracon only offers a 100 MHz bandwidth with a frequency range of 2.142 GHz to 2.484 GHz. So knowing the actual frequencies of the Karma Controller would be paramount. The Abracon is more expensive, so just the bandwidth might not be the reason that GoPro chose one over the other.

Any thoughts?
Does any one have the RangePro spec sheet?
Has anyone taken apart the RangePro so see what actual antenna is inside?
Has anyone else actually measured the frequencies?

Thanx!

Brett
 
  • Like
Reactions: XerxesZ

Rcsaugus

New Member
Joined
Jun 19, 2019
Messages
2
Reaction score
1
Age
57
I went all out and never lose a signal now , I was losing about 400' in both alt and dist. Now I can go farther then my bat will allow . 2000' 3000' . It was designed for a solo 3 , I mad my own mods and it is fantastic. here are some photos and a website . www.rexuav.com.
 

Attachments

New Threads

Members online

No members online now.

Forum statistics

Threads
826
Messages
5,767
Members
1,712
Latest member
Benjamin 4130