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Output power and shielding range of GPS jammers

Perfectjammer 2022/08/25

  Output power is a term you'll see next to almost any jammer, and it's worth it. The more power a device has, the larger the area it can block the signal from running. This is called the radius, or the distance the signal can reach the device again before the signal starts to be free from outside interference. Typically, these radii (or ranges) are in meters, and the longer the distance, the fewer problems you'll have with tracking devices or annoying navigation signals in your day-to-day life.

Output power and shielding range of GPS jammers

  100 meters. This is the largest common jammer radius we have. It is used in many larger buildings to eliminate the presence of signals from the ground floor and anywhere below.

  10 kilometers. In some countries where military tracking devices are banned, cheap GPS jammers are used to stop them from working.

  1,000 meters. We're talking about a one-kilometer interference radius. Often, these jammers can be installed in military installations to defend against GPS-guided weapons systems.

  A good analogy for what happens when there are jammers nearby: imagine if you and a friend about 20 feet away were standing in front of the speakers at an outdoor concert; they could both hear each other clearly and understand what are they talking about. Now imagine there are 100 people between them, all talking loudly; very few words are articulated now because they are drowned out by all the other sounds around. This is the base case when there are multiple signals around us and they merge into one big market

  The jamming radius of a GPS blocker is proportional to its power output. Signal strength decreases by the square of the distance from you, so doubling your distance from any annunciator will reduce its strength by a factor of four. This means you are more likely to block low-frequency jammers (1-5 GHz) than high-frequency jammers (5-15 GHz).

  10 m. This is great for use in a car where you want to protect yourself from sneaky hackers tracking your car's location. It can be used at home or in the office, but it's especially useful if you want to protect yourself from GPS tracking devices placed in your car.

  Most people will find that 10 meters is the largest common jammer radius, and this power does a good job of eliminating the presence of signals from anywhere above and below (but not above) the ground.

  4 meters. This is the largest size of most tracking shielding devices, and this size is often used by businesses that want to shield signals in large office buildings or warehouses with multiple levels of cubicles.

  3 meters. A larger tracking-blocking device, potentially covering an entire room or several rooms, depending on the number of jammers used at one time.

  2 meters. It's a bigger option for those who want to cover more ground and/or want to interfere with more devices at once.

  1 meter. A common choice for tracker-blocking devices that fit into a phone case or wallet.