The shape of the jammer is increasing

Cell phone jammers in everyday life may seem like a pretty good idea: Who wants to sit next to someone on the train who’s yammering away to their doctor about the gross details of their last bowel movement? Wouldn’t you get more work done in the library or at your job if you stopped texting your best friend every two minutes?The high school student xiaoqian said that during the school period is the state of shutdown, the mobile phone is used when returning home to contact parents. “There is nothing wrong with installing a signal shield in the class, which will ensure normal teaching order.” Xiao qian agreed with the school’s practice.

Mr. MacNeil has taken steps in the past to prevent use, including the purchase of a cell phone jammer, a device that cuts out service. The device is considered illegal, yet no one has been prosecuted in the United States for having one, he said. Mr. MacNeil added that at the time he purchased the jammer, he talked to the teachers in neighboring classrooms about it, who were in full support. The jammer is less effective at this point because it has become outdated. It only blocks up to 3G signal, and students with smartphones can still use WiFi.

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. signal 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.

The powerful ALQ-99 tactical jamming pod first entered U.S. Navy service in 1971, carried by the EA-6 Prowler, an electronic-warfare variant of the A-6 Intruder carrier-based attack plane with a four-man crew. The U.S. Air Force eventually supplemented the Prowler with faster and larger EF-111 Ravens, informally known as Spark Varks because of the intense static buildup their jammers generated.

As the drone threat has continued to evolve, the technology used to counter them has also matured. Early solutions which may seemed janky and offbeat (such as using birds) have given way to those rooted in existing military technology. One common setup appears to have evolved: which integrates modern radar, electro-optical sensing, and jamming technology in a complete anti-drone system.