22/08/2026
RF bands divide the electromagnetic spectrum into frequency ranges used for wireless communication. HF (3–30 MHz) supports long-range communication, while VHF (30–300 MHz) is widely used for FM radio, aviation, and public safety. UHF (300 MHz–3 GHz) powers mobile networks, Wi-Fi, Bluetooth, and IoT. SHF (3–30 GHz) is common in microwave links, satellite communication, and radar. EHF (30–300 GHz) enables mmWave 5G, automotive radar, and high-resolution imaging. As frequency increases, antenna size decreases, but free-space path loss increases. Choosing the right band depends on range, bandwidth, propagation, antenna size, noise, and system requirements.
