Frequency Bands and Their Uses
1. Extremely High Frequency (EHF) 30 - 300 GHz
Uses
- 5G Networks
- 5G millimeter wave band
- 6G and beyond (Experimental)
- RADAR
2. Super High Frequency (SHF) 3 - 30 GHz
Uses
- Ultra-wideband (UWB)
- Airborne RADAR
- Satellite Communication
- Microwave Link Communication or SATCOM
3. Ultra High Frequency (UHF) 300 - 3000 MHz
Uses
- Satellite Communication
- Television
- Surveillance
- Navigation aids
Also, read important wireless communication terms
4. Very High Frequency (VHF) 30 - 300 MHz
Uses
- Television
- FM broadcast
- Navigation aids
- Air traffic control
5. High Frequency (HF) 3 - 30 MHz
Uses
- Telephone
- Telegram and Facsimile
- Ship to coast / ship to aircraft communication
- Amateur radio
6. Medium Frequency (MF) 300 - 3000 KHz
Uses
- Coast guard communication
- Direction finding
- AM broadcasting
- Maritime radio
7. Low Frequency (LF) 30 - 300 KHz
Uses
- Radio beacons
- Navigational aids
8. Very Low Frequency (VLF) 3 - 30 KHz
Uses
- Navigation
- SONAR
Some Important Questions about Different Frequency Bands
Q. What is -3dB frequency response or -3dB bandwidth?
A. At the circuit level, the phrase -3dB frequency response is frequently used. In short, a -3dB frequency response indicates that the signal's power has decreased to half of what it was initially. The frequency at which the output gain is lowered to 70.71% of its highest value is defined by these -3dB corner frequency points. Then, we can rightly state that the frequency at which the system gain has decreased to 0.707 of its maximum value is at the -3dB point. [Read More]