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Author Author: olivercohen
Date Created: 30 Jul 2019 6:57 AM Date Created
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Radio frequency

30 Jul 2019

I have a moving vehicle which I need to communicate with.

Radio frequency has its limits with distance.

My question is if I take an aerostat ballon to 400m high

Place a antenna attached to a tracker To always send the waves to the vehicle.

Will that work?

Also how do I tranmit to the aerostat antenna from the ground control 400m down ?

Any ideas?

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olivercohen over 6 years ago

VHF frequency
I am looking for a distance of 100km
I would like to transmit data video live streaming
150kpbs
from HQ to vehicle sending directions
From Vehicle to HQ video streaming.
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olivercohen over 6 years ago

VHF frequency
I am looking for a distance of 100km
I would like to transmit data video live streaming
150kpbs
from HQ to vehicle sending directions
From Vehicle to HQ video streaming.
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shabaz over 6 years ago in reply to olivercohen

I don't believe that's practical in the way described over such distances to/from a moving vehicle with a whip antenna, using any known legal unlicensed spectrum.
You can calculate it here, if you know your receiver sensitivity for a good picture/reliable data stream:
https://www.changpuak.ch/electronics/pathloss_rssi.php
If you have some alternate antenna/tracking scheme that you think will work, then the antenna gain can be plugged into the calculator too.
A workable option is cellular, if the locations are covered by such a network.
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