Why are jammers popular? from ishida's blog

Consideration has been given to using cell phone jammers inside of prison walls to render them ineffective. The practice of jamming cell phone signals is illegal in the United States. Exceptions to this law have been considered for prisons, though there is concern that a cell phone could be a guard's lifeline in a crisis, and other rescuers may need to use them for communication.

Some US federal and local prisons are pushes to use cell phone jamming technology to stop the illegal mobile phone use in prison. To help keep contraband from being smuggled into state correction facilities, the Tennessee Department of Corrections asked the Federal Communications Commission to lift its ban on cell phone-cell phone jammer for sale technologies in jails and prisons. South Carolina prison officials have been pushing the Federal Communications Commission for several years to allow cell phone signals at prisons to be jammed.

Basically, when it comes to students using their phones during the school day, a district survey found that 74 percent of teachers think the current policy — students can possess phones and use them during lunch or passing periods — isn't strong enough, while 61 percent of parents say they would insist on their kid having a phone on them even if the district banned cellphones.

The arrival of drones and their impact on the lives of the average person has certainly taught us a lesson about technological naivety. Proposals and the rapid approval of new legislation intended to control drones illustrates this perfectly. Drone jamming, a concept previously considered to be a bit like sci-fi has become an everyday reality. In the same way that national security regulations keep our airports and military installations safe, so does the new legislation governing drones.

That’s why the US needs “penetrating” 4G jammer, Bacon said: stealth aircraft that are harder – though hardly impossible – to target and which can slip into enemy airspace to conduct electronic warfare at shorter ranges. GPS denial is a becoming a huge issue for American military planners. Peer states, especially Russia, are already putting GPS spoofing and jamming tactics to work during various training events near their own borders. We have discussed this situation in great depth before, and I would suggest you read this article to understand just how deeply the loss of reliable global positioning system data can mean for the U.S. and its allies during a time of war, as well as what is being done to overcome such a monumental hurdle.

In the information age, mobile phones seem to have become a necessity for life, and nowadays it is not uncommon for students to bring mobile phones to school. Although small and medium-sized schools around the world are not allowed to carry mobile phones while they are in school, the phenomenon has repeatedly been banned. In recent days, a high school in the provincial capital has been forced to turn off the lights in the evening and turn on the "high-tech" -- mobile phone screening device. I didn't think that the kind act attracted some parents' complaints. One was that they were afraid that the screening instrument was not good for the students' health, and the other was that they would lose contact in the middle of the night. The school was forced to stop using mobile phone shielding.

As long as it is electronic products have radiation, as for the radiation shielding device, slightly larger than the cell phone, routers, but choose normal manufacturer's products, through the national multiple departments detection, conforms to the national radiation protection sign value, there is no impact on the human body. The radiation is less than 40 microwatts per square centimeter and is safe.