This explanation is a bit superficial, and intended for simplifying things. However, if we try to “dig” deeper in to this issue, more parameters may enter the comparison between the signal levels of the two “links”.One example is the SNR (Signal to Noise Ratio) that the receiver “sees”at its input. Sometimes the jamming signal arriving at the receiver input, can be lower than the communication (“partner’s”) signal and still prevail. This is happening because usually the receiver needs a certain “margin” between the two signals at its input, in order to be able to interpret one of them (usually the stronger one). However, in advanced communication systems, this “margin” can sometimes be even negative (meaning that the communication signal can be much lower than the jamming signal), and the receiver will still be able to interpret the “partner’s” signal, making jamming a much harder task.
The country’s anti-drone air defense force is training with a rifle-shaped antenna that can jam the remote control signals of a drone. The jammer-wielding soldiers are paired with other shotgun-armed squad members, whose shotguns fire specialized shells. (As to how those shells are specialized, the Ministry doesn’t say, but there is at least one counter-drone system which fires shotgun shells that release nets on the target). Rifle-shaped jamming devices are more common in the counter-drone world, and the United States had adopted them to such a degree that even the National Guard trains with drone-gps jammer rifles.
In the future, while we will hopefully never fight Russia or China, we almost certainly will fight someone who has bought advanced jamming and electronic warfare systems from them or even some of our own allies, said Tom Greco, Gen. Perkins’ chief of intelligence: “It is not a stretch to say that just about any capability that we have has the potential of being disrupted.”An apparently different type of anti-drone weapon spotted in Iraq is DroneDefender, made by Battelle, which resembles an assault rifle but features a directed energy frequency jammer mounted on the frame. It has a range of about 400 yards and works by disrupting the links to the drone controller or GPS signal jammer.
A handheld drone jammer will be putting out jack relative to a land based omnidirectional antenna, as the Omni direction antenna will have access to far more power and can get hotter before being inoperable.The EM jammer and net systems require careful aim, significant physical outlay, and you still have to drag your target out of the sky. This lets you tell the drone “DIE NOW” and hope there isn’t anyone underneath to get caught up in the obedience.