The Special Radio category covers unusual, niche and technically interesting radio communication systems that do not fit into ordinary consumer wireless, ham radio or standard broadcast categories. Topics include underground and cave radio, VLF and ELF communication, emergency radio systems, body-worn and referee intercoms, industrial wireless links, covert or low-probability-of-intercept communication concepts, maritime and aviation radio, railway and utility communication, telemetry, remote control systems, experimental antennas, legacy radio networks and specialized professional RF equipment. The articles focus on how these systems work, why they were developed, what frequencies and modulation methods they use, and where they are still relevant in modern communication technology.
The revolution of autonomous transportation is not based solely on artificial intelligence, sensors, and processing algorithms. Equally crucial is communication between vehicles and their environment, known as V2V (Vehicle-to-Vehicle) and V2X (Vehicle-to-Everything) systems and their radio technology foundations. These technologies allow vehicles to exchange real-time data with each other, the…
Communicating underground is a unique challenge. In the world of caves—where walls are thick, passageways twist, and the Earth itself becomes a barrier—standard radio equipment simply doesn’t cut it. For cavers, scientists, and rescue teams, staying connected requires going beyond conventional radio technology. This article explores the fascinating world of…
During the Cold War, radio waves became one of the most contested and monitored forms of communication between East and West. While the Iron Curtain physically divided Europe, radio broadcasts from the West still penetrated deep into Eastern Bloc countries — but not without a fight. These signals were perceived…
Radio frequency jamming is one of the most serious threats to modern radio technology and communication systems. Although jamming was already known during World War I, in the age of digital and adaptive systems it has taken on entirely new dimensions. This article provides a detailed overview of the concept…
Military communication has always been one of the most critical elements of information warfare. The possession, protection, and reliable transmission of information provide strategic advantage both in peacetime and during conflict. In the 21st century, radio communication and encryption technologies have undergone tremendous developments, driven by the digital revolution, artificial…
In the fast-paced world of live music, theater, and events, it’s hard to imagine a show without the freedom of wireless sound. Whether you’re watching a band light up a concert stage, attending a church service, or presenting at a high-stakes conference, wireless microphones and in-ear monitor (IEM) systems are…