Skip to main content

Frequency Bands : EHF, SHF, UHF, VHF, HF, MF, LF, VLF and Their Uses


Frequency Bands and Their Uses

1. Extremely High Frequency (EHF) 30 - 300 GHz

Uses

2. Super High Frequency (SHF) 3 - 30 GHz

Uses

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]

Further Reading

๐Ÿ“Š MATLAB & ONLINE SIMULATIONS (Web-Based)
๐ŸŽ“ GATE & UGC - NET SOLUTIONS
๐Ÿ“ก WIRELESS & SIGNAL PROCESSING


Contact Us

Name

Email *

Message *

Popular Posts

OFDM Symbols and Subcarriers Explained

This article explains how OFDM (Orthogonal Frequency Division Multiplexing) symbols and subcarriers work. It covers modulation, mapping symbols to subcarriers, subcarrier frequency spacing, IFFT synthesis, cyclic prefix, and transmission. Step 1: Modulation First, modulate the input bitstream. For example, with 16-QAM , each group of 4 bits maps to one QAM symbol. Suppose we generate a sequence of QAM symbols: s0, s1, s2, s3, s4, s5, …, s63 Step 2: Mapping Symbols to Subcarriers Assume N sub = 8 subcarriers. Each OFDM symbol in the frequency domain contains 8 QAM symbols (one per subcarrier): Mapping (example) OFDM symbol 1 → s0, s1, s2, s3, s4, s5, s6, s7 OFDM symbol 2 → s8, s9, s10, s11, s12, s13, s14, s15 … OFDM sym...
Read more

LDPC Encoding and Decoding Techniques

Low Density Parity Check (LDPC) Guide Comprehensive analysis of linear error-correcting block codes, Tanner graphs, and 5G-NR implementations. ๐Ÿ“˜ Overview ๐Ÿงฎ Encoding ๐Ÿงฉ Decoding ๐Ÿ“š Resources Theory Encoding Tech Tanner Graph 5G Encoding Decoding 'LDPC' is the abbreviation for 'low density parity check'. LDPC code H matrix contains very few amount of 1's and mostly zeroes. LDPC codes are error correcting code. Using LDPC codes, channel capacities that are close to the theoretical Shannon limit can be achieved. Low density parity check (LDPC) codes are linear error-correcting block code suitable for error correction in a large block sizes transmi...
Read more

Online Simulator for ASK, FSK, and PSK Signal Generation

Interactive Digital Signal Processing (DSP) Tutorial and Simulator for ASK, FSK, and BPSK modulation techniques. Try our new Digital Signal Processing Simulator!   •   Interactive ASK, FSK, and BPSK tools updated for 2025. Start Now Digital Modulation Visualizer: ASK, FSK, & BPSK Simulator Learn and visualize binary modulation techniques (ASK, FSK, BPSK) in real-time with adjustable carrier and sampling parameters. Perfect for DSP students and engineers. ๐Ÿ“ก ASK Simulator ๐Ÿ“ถ FSK Simulator ๐ŸŽš️ BPSK Simulator ๐Ÿ“š More Topics ASK Modulator FSK Modulator BPSK Modulator Demodulation More Topics 1. ASK (Ampli...
Read more

Design of CMOS Flip-Flops (SR, D, JK)

Design of CMOS Flip-Flops (SR, D, JK) A flip-flop or latch is a circuit with two stable states, used to store state information. It is the basic storage element in sequential logic and a fundamental building block in digital electronics systems, including computers and communication devices. Flip-flops and latches act as data storage elements for states, pulse counting, and synchronization of variably-timed input signals to a reference clock. Flip-flops can be transparent/opaque (latches) or clocked (synchronous, edge-triggered). Latches are level-sensitive, while flip-flops are edge-sensitive. In sequential logic, the output depends on current inputs and previous states. Fig.1 shows a sequential circuit combining a combinational block and a memory element. ...
Read more

Online Simulator for Frequency Modulatiuon and Demodulation

FM Modulation Simulator Frequency Modulation (FM) In Frequency Modulation, the frequency of the carrier signal varies in accordance with the message signal's amplitude. s FM (t) = A c cos(ฯ‰ c t + k f ∫m(t)dt) where ฯ‰ = 2ฯ€f & k f = Frequency Sensitivity Modulation index, ฮฒ = (k f * A m ) / f m Change the parameter values to see the effect. Message Freq (Hz) 1 Carrier Freq (Hz) Message Amplitude (Am) Kf (sensitivity): 50 Perform FM Demodulation ๐Ÿงช Experiment for Students: ...
Read more

Flat vs Frequency Selective Online Simulator

Flat vs Frequency Selective Online Simulator Channel Type Without Fading Flat Fading Multipaths Nakagami m SNR(dB) Run Simulation Input Signal Signal After Fading Constellation Diagram BER vs SNR Explore Advanced Flat vs Frequency-Selective Fading Simulator Want to see these equations in action? Visualize it. Launch Simulator Tool Interactive Rayleigh Fading Simulator Want to see Rayleigh fading in action? Visualize it. Launch Simulator Tool Return to DSP Simulations Main Page →
Read more

Phase Demodulation Simulation

Instructions for Phase Modulation (PM) Step 1: Click on 'Generate Message' button to generate input message signal Step 2: Then click on 'Generate Carrier' button to generate carrier signal. The carrier frequency has to be more than the message frequency and You can change frequencies using sliders Step 3: Click on 'Generate Phase Modulated Signal' button to generate Phase Modulated Signal Step 4: Click on the 'Show Frequency Spectrums of PM' button to see spectrums of the PM signal Here, ฮฒ represents the phase modulation index, given by ฮฒ=kp*Am​, where Am​ is the amplitude of the message signal (assumed to be fixed), and kp​ is the phase sensitivity of the modulator 5 Hz Step 1: Generate Message 50 Hz ...
Read more