Contents
What is a Channel?
A channel, also referred to as “ch,” is a term commonly used in the context of communication and broadcasting. In the field of electronic communication, a channel represents a specific frequency band that is utilized for transmitting and receiving signals.
Classification of Frequency Bands
Frequency bands are categorized based on their respective ranges, and each band is allocated to a specific purpose, such as communication or broadcasting. Let’s explore the classification of frequency bands commonly used in communication and broadcasting:
1. Very Low Frequency (VLF) Band
The VLF band ranges from 3 to 30 kilohertz (kHz). It is primarily used for long-range communication, such as submarine communication and navigation systems. Due to its long wavelength, VLF signals can penetrate the earth’s surface and travel long distances, making it suitable for reliable communication in specific applications.
2. Ultra High Frequency (UHF) Band
The UHF band operates within the frequency range of 300 megahertz (MHz) to 3 gigahertz (GHz) and is commonly used for television broadcasting, wireless microphone systems, and cell phone communication. UHF signals have a shorter wavelength, allowing for more efficient transmission in urban areas with buildings and other obstacles.
3. Extensive Frequency Modulation (EFM) Band
The EFM band covers frequencies from 30 megahertz (MHz) to 300 megahertz (MHz). It is widely used for commercial FM radio broadcasting. EFM signals exhibit a high fidelity sound quality, making it suitable for music and voice transmission.
4. Super High Frequency (SHF) Band
The SHF band operates within the frequency range of 3 gigahertz (GHz) to 30 gigahertz (GHz). It is commonly utilized in satellite communication, microwave ovens, and wireless local area networks (WLANs). SHF signals offer high data transfer rates and are popular for transmitting large amounts of information quickly.
Conclusion
Channels, represented as “ch,” are specific frequency bands used for communication and broadcasting. Each frequency band has its characteristics and is allocated for different applications. Understanding the classification of frequency bands is crucial for efficient and reliable communication in various industries.
Reference Articles
Read also
[Google Chrome] The definitive solution for right-click translations that no longer come up.