Raadiospektri

Raadiospektri, also known as radio spectrum, refers to the range of electromagnetic frequencies used for radio communication. It is a segment of the electromagnetic spectrum that spans from approximately 3 Hz to 300 GHz. The radio spectrum is divided into various bands, each designated for specific types of communication and applications. These bands include Very Low Frequency (VLF), Low Frequency (LF), Medium Frequency (MF), High Frequency (HF), Very High Frequency (VHF), Ultra High Frequency (UHF), Super High Frequency (SHF), and Extremely High Frequency (EHF). Each band has unique propagation characteristics, which influence their suitability for different communication purposes, such as broadcasting, mobile communications, and satellite communications. The radio spectrum is a finite resource, and its efficient use is crucial for modern communication systems. The International Telecommunication Union (ITU) regulates the allocation and use of the radio spectrum to ensure that different services do not interfere with each other. Advances in technology, such as the development of software-defined radios and cognitive radios, are helping to optimize the use of the radio spectrum and address the challenges of spectrum scarcity.