Ever get annoyed at other people talking loudly on the phone and disturbing your morning commute? Turns out there is a way you could put an end to those calls – cellphone jammer device.While the Russian army, and the Soviet army before it, long has operated R.F.-jammers, it wasn’t until October 2017 that the Kremlin stood up its first ground-based unit specializing in defeating enemy drones.
The counter-drone system — for protecting airports and infrastructure — is the counter-UAV system, which combines radar, RF and optical sensors and a targeted jammer. Part of a modular family of products, includes various sensors such as radar, camera and radio frequency detectors and direction finders and jammers. It uses sensors to detect and identify a drone as far as several miles away. A jammer — using real-time signal analysis — then interrupts the link between drone and its pilot, or interferes with the drone’s navigation system.
There is demand, there is supply. The mobile jammer came into being, and it became more and more ingenious. Some make the appearance of mobile phone, also some make official box shape, the user can set a “quiet space” for oneself within a range of several tens of meters to several hundred meters.4G jammer is not a new technology, but in recent years, American demand for jammers has continued to increase, with thousands of jammers imported from overseas to the United States every month. It is reported that the purchase of jammers includes cafes, hairsalons, cinemas and hotel owners, public speakers, bus drivers, and even more bus passengers.
A school in suzhou has installed a cellphone signal shield in every classroom. Netizens think that, as a school is not the college entrance examination examination site, the installation of mobile phone signal shielding device is not very reasonable, open at ordinary times, and damage the interest of the students and teachers, disable hope school, and remove the mobile phone signal shielding device.
Some countries are allowing businesses and government organizations to install jammer in areas where cell-phone use is seen as a public nuisance. In December 2004, France legalized cell-phone jammers in movie theaters, concert halls and other places with performances. France is finalizing technology that will let calls to emergency services go through. India has installed jammers in parliament and some prisons. It has been reported that universities in Italy have adopted the technology to prevent cheating. Students were taking photos of tests with their camera phones and sending them to classmates.