Low frequency is the band of the radio spectrum spanning roughly 30 to 300 kHz, abbreviated LF, known for long wavelengths and reliable long-distance propagation.
Low frequency designates the part of the radio spectrum from about 30 to 300 kHz, characterized by long wavelengths that follow the curvature of the earth and propagate reliably over long distances. These properties have historically suited the band to navigation aids, time signal broadcasts, and certain communication services. The dependable propagation of low frequency signals is their defining advantage.
In commercial and industrial communication, the low frequency designation informs the selection of transmission lines and components matched to the band. Although most modern data systems operate at far higher frequencies, band designations like low frequency remain part of the framework engineers use to align cable and equipment with the signals they carry. Knowing a signal's band helps ensure the transmission line is suited to its propagation and impedance needs.
Antennas and transmission lines for low frequency work are sized with the long wavelengths in mind, and the supporting cable is selected to match both the frequency and the power levels these long-range systems typically involve.
At Windy City Wire, the focus on signal and coaxial cable for commercial communication spans the range of frequencies a facility may use. Recognizing band designations like low frequency supports the selection of cable matched to the requirements of each communication system.
LF (Low Frequency)
ITU (International Telecommunication Union), which defines radio frequency band designations