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Handheld Cell Phone Blocker 16 Bands 5G Jammer

Signal jammer will play a decisive role in electronic warfare

Perfectjammer 2022/07/18

  While “interference” generally describes unintentional forms of disruption during wireless communications, “jamming” describes the deliberate interference with or blocking of such communications.

Signal jammer will play decisive role electronic warfare

  As the name suggests, jamming antennas, (aka jammers) are specifically used to interfere with radio noise or signals. In electronic warfare these interference are meant to disrupt control of a battle.

  For example, jammers radiate interfering signals toward an opponent’s radar, blocking the receiver with highly concentrated energy signals.

  The two main jamming techniques are noise techniques and repeater techniques. Spot jamming, sweep jamming, and barrage jamming are the three most common types of noise jamming, whereas DRFM jamming is the most common type of repeater jamming.

  Spot jamming is a form of noise jamming, where GPS jammers focuses all of its power on a single frequency, rendering the technique ineffective against a frequency-agile radar.

  This “sweeping” motion jams multiple frequencies in quick succession, although not all at the same time.

  Barrage jamming is the jamming of multiple frequencies at once by a single jammer. The main drawback of this technique is that the jammer spreads it’s power across multiple frequencies, making it comparatively less powerful at a single frequency.

  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. Many jamming antennas use these types of techniques.

  At present, there are several countermeasures against jamming. Similar to jamming techniques, these countermeasures allow for varying levels of effectiveness. Additionally, specifically designed, anti-jam antennas have become available. As new RF technologies emerge, so do developments in electronic warfare.

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EO-0621 6 Bands Handheld Cell Phone Signal Jammers 2G 3G 4G

Small Size Blocker

This product has a very convenient single frequency switch. You can choose to open or close a frequency band as needed. With good heat dissipation system, it can work for a long time. Can block the main mobile phone band and WIFI and GPS signals,No matter what occasion you want to quiet your surroundings, you can use it. Portable design, you can easily carry it.


BT8  Mobile Phone Jammer

18W GPS WiFi 3G 4G Blocker

A very good cell phone jammer! There is a very good cooling system, I tested the continuous operation of 24 hours, but the temperature did not increase significantly. The operation is quiet and unobtrusive. In general, it works very well in the office.....

Date Added: 02/14/2019 by Florence Ferguson