This is the second in a series of articles about FM transmission systems. The first appeared Oct. 9. How many bays do I need in my antenna and how much transmitter power do I need? These questions ...

U.S. Air Force Staff Sgt. Corey Johnson, Tactical Air Control Party member, communicates with French air force aviators during a tactical exercise Feb. 24, 2016, in Djibouti. Although aviators across ...

Delta RF Technology C 1122 SWR C 1126 Superior Broadcast C 1312 Dielectric C 1907 Larcan C 1916 Propagation Systems Inc C 1920 Kathrein, Scala Division C 2213 OMB America C 3324 Electrosys C 3331 ...

Sometimes, it is useful to transmit a low-power radio signal to create a beacon, to send a signal carrier to a near receiver, to transmit in QRP or QRPP mode, and so on. The circuit shown here is very ...

We think of radio navigation and direction finding as something fairly modern. However, it might surprise you that direction finding is nearly as old as radio itself. In 1888, Heinrich Hertz noted ...

For the first time, researchers have used a laser as a radio transmitter and receiver, paving the way for towards ultra-high-speed Wi-Fi and new types of hybrid electronic-photonic devices. You've ...

For the first time in history, a prototype radio has been created that is claimed to be completely digital, generating high-frequency radio waves purely through the use of integrated circuits and a ...

Bench-top model: the optical setup of the Grenoble analogue photonic correlator, which can be used to locate a radio transmitter. (Courtesy: Hugues Guillet de Chatellus/Université Grenoble Alpes-CNRS) ...