Megahertzbereich

Megahertzbereich, or the megahertz range, refers to a portion of the radio frequency spectrum in which operating frequencies are measured in megahertz (MHz). It is typically defined as roughly 1 MHz to 1000 MHz (1 GHz), corresponding to wavelengths from about 300 meters down to 0.3 meters. Because different regulators and technical contexts sometimes describe bands slightly differently, the exact upper and lower limits can vary in practice.

In terms of propagation and technology, signals in the megahertz range are generally characterized by a mix of line-of-sight transmission and, at the lower end, longer-range skywave propagation. Antennas for this range can be relatively compact compared with lower frequencies, enabling widespread consumer and professional equipment. As frequency increases within the range, wavelengths shorten and communication tends to become more line-of-sight with higher data capacity but shorter reach without repeaters or amplification.

Common applications and examples include FM radio broadcasting in the 87.5–108 MHz band, and various VHF communications bands used for aviation, maritime, public safety, and amateur radio. Amateur allocations also spread across multiple bands within the range, such as around 1.8–2.0 MHz, 3.5–4.0 MHz, 7.0–7.3 MHz, and 144–148 MHz, among others. The megahertz range remains important for many wireless services and forms a transition zone to higher, gigahertz frequencies used by modern wireless networks.

Regulatory management assigns specific bands to different services and often requires licensing or coordination to minimize interference.