Scientists track intense radio signals from space to their origin – and are shocked by what they find - ‘Just when you think ...

FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...

Compared to the simple diode needed to demodulate AM radio signals, the detector circuits ... Pulse counting works by generating a narrow, fixed-width square wave pulse at a set point in the ...

Mysterious signals have been picked up from distant galaxies. When fast radio bursts or FRBs, as they are called, reach Earth's telescopes they shine brightly for a few milliseconds, then disappear.

Instead of finding the radio burst in a region of young stars, researchers traced its origin to the outskirts of a “dead” ...

By collecting and amplifying weak radio signals bounced off large metallic ... He shared his theoretical work with them, even as he resignedly said to his fellow-researchers, "We've been scooped." ...