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Re: [Paparazzi-devel] circular polarized antenna hype

From: Reto Büttner
Subject: Re: [Paparazzi-devel] circular polarized antenna hype
Date: Tue, 21 Aug 2012 10:31:14 +0200

Hi Tilman

This weekend I sucessfully tested my setup over 25 km (10 km more than
last time):

- 2.4 GHz XBee Pro
- 14 dBi linear polarized patch antenna on the ground station
- Standard whip antenna (just the 1 inch wire) on the aircraft. The
antenna vertical, perpendicular to the ground plane and in free air
(not in the fuselage nor near to any other disturbing objects).
- 9600 baud
- Default telemetry

If you want to be able to loose line-of-sight to the groundstation
consider DroneCell:
Be aware of legal restrictions concerning flying out of sight.

Cheers, Reto

2012/7/23 Tilman Baumann <address@hidden>:
> On 23/07/12 15:07, Reto Büttner wrote:
>> Hi Tilman
>> I get over 15km perfect reception using 2.4 GHz XBee and a 14 dBi
>> linear polarized patch antenna on the ground station and a standard
>> whip antenna on the aircraft. Do you need any more?
>> [...]
>> Antenna tracking was no issue for me so far. At long range it is no
>> problem to manually track the antenna as things go very slowly. At
>> short range you don't need antenna tracking.
> That sounds good enough indeed.
> Maintaining line of sight can be tricky of course. But that is a 2.4Ghz
> problem, no matter what antenna.
> Where I'm currently flying I can easily get behind dense tree lines and a
> small hill. :-/
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