Engineers chose frequency-shift keying to send telemetry from the satellite because of its resilience to noise.

Naval engineers measured how extremely low frequency signals propagate through seawater to improve undersea communication.

The submarine uses ultra low frequency for long-range communication.

During the contest, the ham operator checked the maximum usable frequency before transmitting to ensure his signal would reach across the ocean.

The engineers analyzed the ultra high frequency to determine why the TV broadcasts were experiencing interference.

The radar operates in the super high frequency range to achieve better resolution for short-range targets.

Marine mammals can detect ultra low frequencies that travel long distances underwater.

Researchers are investigating how extremely low frequencies affect human perception during long-term exposure.

The startup unveiled a new radio frequency integrated circuit that reduces noise in 5G receivers.

Detecting high-frequency gravitational waves could open a new window into the physics of the early universe.