The harm of GPS jammer is also very big

irst of all let me tell u how a signal jammer works. Lets take an example of mobile phone signal jammer. So what is does is it just creates radio waves of same frequency on which the mobile functions. As a result the phone gets confused between the two similar frequencies and donot function.

Drone Jammer was designed to neutralize the flight unauthorized Drones/Quadcopters by jamming their downlink signal. It has unique software which allows quickly detecting the drone and jamming the hostile drone from ranges of up to 4km (with special dedicated antennas). The below provides technical description of the system.

The potential for electronic warfare jamming that can knock out satellite navigation over wide areas is a very real threat. the potential effects of GPS jamming isn’t widely known, yet the threat gets bigger the more we rely on GPS.

The U.S. military is conducting tests of a wide-area gps jammer with the potential to knock-out signals from Global Positioning System satellite navigation in California from beyond the Oregon border to well into Mexico during testing periods.

North Korea reportedly purchased truck-mounted GPS jammers from Russia with a range of thirty to sixty miles, and in 2011 was reportedly at work on even longer-range jammers. Sixty miles is more than enough to jam the greater Seoul metropolitan area, home to half of South Korea’s population.

For a radio jammer to work, it needs to be fairly close to the signal its crew wants to disrupt. The Avtobaza, for one, can detect targets up to 93 miles away, according to Air Power Australia, an independent think tank specializing in military electronic systems. Jamming requires more power than detecting does, so the range at which the Avtobaza can disrupt a drone is certainly shorter than 90 miles.

South Korean civil aviation is particularly vulnerable to jamming because Incheon International Airport—which serves the greater Seoul metropolitan area—is close to the border with North Korea. Incheon is only 23 miles from the demilitarized zone. 49.2 million passengers passed through Incheon in 2015, making it one of the busiest airports in the world.