For all its advantages, the LMADIS does have some blind spots. It’s relatively ineffective against a fully autonomous drone, for instance; jamming’s not very useful if there’s no communication in the first place. It inconveniences bigger UAVs rather than destroying them. And there’s the potential for friendly fire; a nearby US helicopter could see its own communications disrupted, for instance, if it gets winged by an RF blast. Which is why the LMADIS system, despite its recent success, should be seen as the first phase of a much more ambitious project.
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Which means that while LMADIS apparently fried the circuits of the Iranian drone last week—the first-ever “kill” by a US directed-energy weapon—that’s not always the expected result. “The UAV will typically go into some kind of default pattern, to return to base or to go land somewhere,” says Clarke. “The system is powerful enough that for a smaller UAV, if it gets close enough, the energy from the GPS jammer will disrupt the electronics on the drone, and cause it to just fail. But normally the jammer would be used just to jam the communications.”
According to foreign media reports, Nissan (Nissan) has demonstrated its weapons against the latest driver distraction – a prototype on can be installed in the future car compartment, is reportedly can block cell phone signals, caused greatly reduced cell phone distractions.
While GPS signal jammer can cause minor disturbances, such as signal loss, they can also pose a large risk to public safety. For instance, GPS jammers cannot distinguish between types of communications and may block ingoing or outgoing calls from emergency responders. Additionally, the devices could block more than calls and disrupt all communications within a broad frequency range.