After ultra high frequency (UHF), the frequency spectrum continues into the super high frequency (SHF) range. SHF spans frequencies from 3 GHz to 30 GHz. This range is used for a variety of applications including satellite communications, radar systems, microwave links and wireless Lans (local area networks). SHF frequencies offer higher bandwidth and data transmission rates compared to UHF, making them suitable for high-capacity communications networks and broadband applications.
Beyond UHF and SHF, the frequency spectrum progresses into the extremely high frequency (EHF) range.
EHF covers frequencies from 30 GHz to 300 GHz. These frequencies are used in applications such as radio astronomy, high-speed wireless communications systems, and millimeter wave radar. EHF frequencies enable ultra-high data rates and support advanced technologies like 5G wireless networks, automotive radar and remote sensing applications.
The highest frequency form in the electromagnetic spectrum is found in the Terahertz (THz) range, which extends from 300 GHz to 3 THz.
Terahertz frequencies are characterized by their extremely short wavelengths and find applications in imaging, spectroscopy, security screening, and high-speed wireless communication research. Terahertz waves occupy the boundary between the microwave and infrared regions of the spectrum, providing unique capabilities for sensing and communications technologies.
The choice between UHF (ultra high frequency) and VHF (very high frequency) depends on the specific application requirements.
UHF generally performs better in urban and densely populated areas due to its ability to penetrate obstacles such as buildings and foliage more effectively. It also supports higher data rates and more channels compared to VHF. On the other hand, VHF frequencies propagate more in open spaces and can provide better coverage over large geographic areas with fewer base stations, making them advantageous for rural and broadcast applications.
Ultra high frequency (UHF) and very high frequency (VHF) refer to specific ranges in the electromagnetic spectrum.
UHF spans frequencies from 300 MHz to 3 GHz, while VHF covers frequencies from 30 MHz to 300 MHz. The main distinction between UHF and VHF is their propagation characteristics and applications. UHF frequencies, being higher in the spectrum, generally offer shorter wavelengths, higher data rates and better penetration through obstacles. VHF frequencies, with longer wavelengths, propagate more in open spaces and are often used for long-range communication, broadcasting, and marine and aviation communications systems