What is a "Jammed Signal"? The Most Authoritative Explanation.

What is signal jamming?

Signal jamming is comparable to a denial-of-service attack – where large amounts of traffic (usually bots) deliberately overload a server to deny anyone from using it. A signal jamming device works by broadcasting “noise” on a specific radio frequency (depending on the type of jammer).

How do radio jamming devices work?

In the United States, radio jamming devices (known as "jammers") are illegal and their use can result in large fines. In some cases jammers work by the transmission of radio signals that disrupt communications by decreasing the signal-to-noise ratio. The concept can be used in wireless data networks to disrupt information flow.

How do you jam a cellphone signal?

Signal jamming a cellphone needs a destructive interference pattern with its radio waves. To do this, jamming devices have to flood a space with a radio wave that matches the phone’s frequency.

How does a radar jammer work?

Noise jammers modulate the jamming signal with AM or phase noise. Deceptive jammers use either a repeater or a memory to produce a replica of a radar return with appropriate modifications in time or frequency. Repeater jammers modify and retransmit received radar signals so the resulting echo relays inaccurate position.