Serg SSA
Core User of DJI
Flight distance : 6406329 ft
Russia
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Let me try to explain about radio communication in a simple way, by analogy with light, it’s the same electromagnetic wave)
So, pure ether is analogous to the darkest night far outside the city. Let's imagine the remote control transmitter in the form of a flashlight, and the antenna in the form of a reflector and lens.
1. The simplest situation is that you stood on a mountain on a dark night and launched a drone, started shining a remote control flashlight at it, i.e. the antennas were pointed correctly. In this case, the drone can fly many kilometers, even tens of kilometers, and in the dark night the light of a flashlight aimed at the drone will be visible.
2. The situation is a little more complicated, for example the same as in the previous example, but outside there is fog, snow, rain, smog - whatever. Light will have difficulty penetrating such a medium and the communication range will decrease.
3. Next, the same dark night, good weather, but you are not standing on a hill, but in the forest, light breaks through the trees, but not very far - the connection is much worse.
4. You are in a village, the night is dark, but the light is interrupted by houses, in principle, light is visible from your drone, but not directly from a flashlight, but reflected light from the wall of a neighboring house - there will also be a connection, but not far. Change your position and the connection will be excellent.
5. You are in the city, there is light shining from all the windows, which creates flare, and after a few hundred meters your drone cannot distinguish the light of your flashlight from the light of lanterns on the street, a spotlight at a construction site, and from the windows of buildings. It is clear that here the light sources are an analogue of radio signals from different sources - wi-fi, cellular communications, home appliances, electric motors, etc. That is. communication within a few hundred meters.
6. The same situation as in step 5, only you stand under a street lamp with a flashlight (analogous to a cell tower) and try to fly - the connection will be even worse, the street lamp will simply block your light. Fly away to 100-200 meters.
7. The same situation as in step 5, only you went to a dark place where there are no trees or a light source, and the drone can fly over houses and other obstacles - the connection will be an order of magnitude better than in step 6. Conclusion - always look for the start an open space without interference is the most important thing in a city. Fly 1 km, conditionally of course)
8. You want to increase the range in the city even more than in step 7, what should you do? Turn on the BLUE flashlight) I.e. for example, red light shines from windows and streetlights, and you use blue) And your drone will be able to distinguish your signal from others that are red at an even greater distance - this is analogous to switching to the 5.8 band.
9. Well, the most radical way is to increase the brightness of the flashlight - analogous to turning on the FCC
In this example, I conditionally considered the connection in only one direction between the remote control and the drone, but the same principle applies in the opposite direction, with some nuances.
I hope I explained it clearly. |
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