What is the main problems of signal propagation?

Question

Besides path obstructions. Hm...

Thanks in advance.

Answer 1

I know one is power.  The efficiency of how the transmitter uses power is a big area looked at when trying to improve radio communications.  Sure, if you could just give a transmitter all the power it wants, it could theoretically transmit across the world.

Or course, we don't have that kind of power, so trying to get the transmitter to use power the most efficient way possible is key.

There's other stuff too- atmospheric disruption (this happens all the time- one day you can get a radio station clear as day, the next day, you can't get it at all) is another big one