Category: How Radio Works
Satellite Radio: How It Works and Where It Stands Today
Satellite radio offers something FM cannot: continental coverage from a single signal, reaching listeners in remote areas, on long road journeys, and anywhere a standard broadcast tower cannot…
What Is Radio Frequency Spectrum and Why Does It Matter
The radio frequency spectrum is the range of electromagnetic wave frequencies used for wireless communication. From AM and FM broadcasting to emergency services and satellite signals, virtually all…
Why AM Radio Is Still Alive in 2026 (and Who Still Listens)
Reports of AM radio’s death have been greatly exaggerated. While FM took over for music decades ago, AM remains a functioning and in some contexts irreplaceable broadcast medium.…
Radio bands explained
When you turn the dial on a portable radio, the needle moves across only a small part of the radio spectrum, which stretches from below 1 kilohertz up…
How stations are licensed
When you turn the dial to 101.5 MHz, the signal you hear is the result of a carefully managed process. The radio spectrum is a finite resource that can…
How AM and FM radio work
When you turn the dial on a portable radio and hear a voice or music, a hidden wave is already traveling through the air. That invisible wave, called…
Digital radio explained
When you turn the dial to a digital station, the display shows a service name, logo, and sometimes song information instead of a simple frequency. The change is…
Unlicensed and Low-Power FM: What You Need to Know
Not all FM radio transmissions require the same level of licensing. Across many countries, there are provisions for very low-power FM operation. In the United States this includes…
What Is HD Radio and How Does It Work?
HD Radio is a digital broadcasting technology used by AM and FM stations in the United States and a number of other countries. Unlike a full replacement of…
RDS: The Hidden Data Layer Inside Your FM Signal
When you look at your car stereo and see the name of the radio station displayed alongside the current song title, you are reading data carried by a…
Understanding Radio Transmitters: From Studio to Antenna
Every radio station you hear depends on a chain of equipment that takes audio produced in a studio and converts it into an electromagnetic signal capable of travelling…
Radio Transmitter Power: What the Wattage Actually Means
When people talk about radio stations, they often mention transmitter power — “a 50,000-watt station” sounds impressive. But what does that figure actually tell you, and why can…