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 ...

Astronomers, using a simple radio antenna in Australia, detected a signal at 78 MHz, interpreted as the absorption of background radiation by hydrogen gas ionized by the universe's first stars, ...

Fender-mounted antennas were once a common feature on many vehicles, offering both functional and aesthetic benefits. These ...

A new simpler, cheaper and potentially more effective way to prevent radio antennas from picking up unwanted signals has been created by researchers in the US. With further development, the technique ...

In a move to make high-speed communications with deep space missions a practical reality, NASA is testing a giant hybrid dish antenna that is capable of handling both radio and laser signals across ...

The Poway City Council took a couple of steps forward last week in resolving what to do about having the city comply with federal and state laws regarding amateur radio antennas. But no sooner had ...

"Whip" antennas—those long metal rods that used to extend from our cars—look pretty cool in a Smokey and the Bandit kind of way. But for military vehicles, they're not such a great solution. Troops in ...

A tiny signal, dating back to the birth of the first stars in our universe, has been detected by astronomers for the first time. Astronomers detected a miniscule radio signal that indirectly indicates ...

Electromagnetic Spectrum (EMS) operations in contested environments require battlefield assumptions based on mission dependent factors and complex ...

When temps start to rise, and everyone wants to have fun in the sun, owning a boat can be a great way to cool off and enjoy an adventure with family and friends. You can get a great deal, especially ...