Kortbølgeradio

Kortbølgeradio, also known as shortwave radio, refers to radio transmissions operating on frequencies between 3 and 30 megahertz (MHz). These frequencies fall within the shortwave spectrum, which is characterized by its ability to travel long distances. Unlike medium wave or long wave, which are limited by the curvature of the Earth, shortwave signals can be reflected by the ionosphere, allowing them to bounce around the globe. This phenomenon is known as skywave propagation and is crucial for international broadcasting.

The development of kortbølgeradio began in the early 20th century, quickly becoming a vital tool for long-distance communication, military operations, and international news dissemination. During World War II, shortwave was extensively used for propaganda and intelligence gathering. Post-war, it facilitated global communication and played a significant role in connecting people across continents before the widespread adoption of satellites and the internet.

Today, kortbølgeradio continues to be used by international broadcasters for reaching audiences in remote areas or where traditional media infrastructure is limited. It also remains popular among amateur radio enthusiasts and for specialized communication needs. The simplicity and long-range capabilities of shortwave technology make it a resilient and reliable communication method, especially in situations where other forms of communication might fail. Despite the rise of digital technologies, kortbølgeradio maintains a unique and enduring presence in the world of radio communication.