How many types of jammer

The concept of signal jamming came into existence from military establishment. The idea is during the war situations when one country do not want their radio transmissions to be intercepted by their enemy. The army use RF signal jammers which does wireless signal jamming near the border areas. Following points are considered for the design of RF jammer.

Spot jamming is a form of noise jamming, where a jammer focuses all of its power on a single frequency, rendering the technique ineffective against a frequency-agile radar. Barrage jamming is the jamming of multiple frequencies at once by a single jammer. Digital frequency radio memory , or DRFM, is a repeater technique that confuses a radar by altering and re-transmitting received radar energy. For example, by changing the delay in transmission of pulses, the jammer can alter the range the radar detects and creating false targets.

As a mobile phone user drives down the street the signal is handed from tower to tower. Its called denial-of-service attack. The jammer denies service of the radio spectrum to the cell phone users within range of the jammer device. Keyword: Mobile jammer, working of mobile jammer, components of mobile jammer, devices of mobile jammer. Cell phones are everywhere these days.

According to the cellular telecommunications and internet association, almost million people in the United States had cell- phone service in October Its great to be able to cell anyone at anytime.

Unfortunately, restaurant, movie theaters, concerts, shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking. While most of us grumble and move on.

Some people are actually going to extremes to retaliate. Cell phones are basically handled two way ratios. And like any ratio the sign can be disrupted. Mobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.

Mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means. Mobile jammer can be used in practically any location, but are used in places where a phone call would be particularly disruptive like temples, libraries, hospitals, cinema hall, school and colleges etc. Mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive.

The civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy. Over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities. A mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station.

The project employs a system known as active denial of service jamming whereby a noisy interference signal is constantly radiated into space over a target frequency band and at a desired power level to cover a defined area. The operational block of the jamming system is divided into two section : intermediate frequency IF section and the radio frequency transmitter module RFT. The RFT comprises an in build voltage controlled oscillator, power amplifier and antenna connectors.

An antenna radiates the jamming signal to space. Upon activation of the mobile jammer, all mobile phones will indicate no network, SOS or searching for service and all phones within the effective radius are silenced. Incoming calls are blocked as if the mobile phone were off. When the mobile jammer is turned off, all mobile phones will automatically re-establish communications and provide full service. We recommend that you do not install base stations within m of the surveillance area.

If the distance between the base stations is too close, the signal may have a great influence between the signals. Ever wondered what kind of device can be controlled with the remote control? Remote controls are used for machines such as TVs and cars. With the help of the remote control, operation can be as easy as ever.

You will get a lot of convenience. Mobile phone jammers also have this feature. As you know, there are many 4G mobile phone jammers on the market.

It also has a remote control function. The operation uses a simple design.