Everything About ___
Live briefing

Everything about High frequency

3–30 MHz range of the electromagnetic spectrum

High frequency (HF) is the ITU designation for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters. Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or "skywave" propagation – these frequencies can be used for long-distance communication across intercontinental distances and for mountainous terrains which prevent line-of-sight communications. The band is used by international shortwave broadcasting stations (3.95–25.82 MHz), aviation communication, government time stations, weather stations, amateur radio and citizens band services, among other uses. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: High frequencyA 5-minute orientation
  2. Skim a recent paper: Optimizing Stimulus Frequency Ranges for Building a High-Rate High Frequency SSVEP-BCIInfluential work since 2022
  3. Pick up a classic book: High-frequency techniques for RCS prediction of plate geometriesThe most-reprinted book on the subject
  4. Read the landmark paper: Robust uncertainty principles: exact signal reconstruction from highly incomplete frequency informationCited 12,736 times
  5. Go sideways: SkywaveA closely related topic
  6. Go sideways: Radio propagationA closely related topic

📖 Definitions

Noun The frequency area from 3 MHz through 30 MHz, commonly used for radio broadcasting.

🗂️ The subject at a glance

  1. Propagation characteristics
  2. Uses
  3. Antennas

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics