Why is the communication distance of data transmission module inversely proportional to the air speed?

Long distances can be considered as delays.

There is a word called "bandwidth delay product", which is closely related to the window size of the sender and receiver. Therefore, "product" is basically established in a system, so the bandwidth of the system to be delayed should be appropriately reduced.

If the bandwidth is high and the delay is large, the window is too large and the efficiency of both parties is reduced.

On the contrary, the two sides are in a state of "idle" waste.