Final answer:
Military aircraft use frequencies in the VHF and UHF bands for communication, such as the 225-400 MHz range. These frequencies should not overlap with commercial ones to prevent interference. Earth also produces radio signal leakage, but these signals are weak and hard to detect at large distances.
Step-by-step explanation:
Military aircraft use a range of radio frequencies for communication, often in the VHF (Very High Frequency) and UHF (Ultra High Frequency) bands. The specific frequencies used can vary, but they often fall around 225-400 MHz for UHF which is mainly used by military aircraft for short-range communication. It's important to understand that these frequencies must not overlap with other commercial frequencies (like the 1.9 GHz used by mobile phones) to prevent interference.
Moreover, aircraft can also use radar systems for detecting the presence of other aircraft or obstacles. This works by transmitting a pulse and then measuring how long it takes for that pulse to be reflected back. This allows precise determination of the distance to the detected object.
It's also worth noting that while we on Earth produce radio signal leakage from FM radio, television, military radars, and spacecraft communication, these leakage signals are still weak and difficult to detect at great distances.
Learn more about Radio Communication in Military Aircraft