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How much range can a low-power jammer installed in a car interfere with?

How much range can a low-power jammer installed in a car interfere with?

  • 2022-08-17
jammer

There are often customers who ask that the jammer needs to be installed on the vehicle, and the vehicle can be used as a carrier to quickly transfer and change the use site. However, since the budget given by the customer is very limited, it is not enough to purchase high-power jamming equipment, so he wants to install a low-power jammer on the car. Then, how much interference can be achieved after adopting this method?

First of all, what we need to know is what the customer needs to achieve: Is the use of a car jammer to interfere with the signal inside the car or the signal outside the vehicle?

Some customers have a very clear purpose, that is, to use jammers in the car, and the scope of the interference is limited to the interior of the vehicle, so it is relatively easy to implement in this case, because the metal frame structure of the vehicle has a certain degree of If a low-power jammer is used, the power supply interface of the cigarette lighter can be directly used as the power supply source of the jammer. A low-power jamming device can usually completely interfere with the mobile phone signals in all areas of the car. live.

Another purpose of use: the use of the car jammer is mainly for the signal outside the vehicle, and even the mobile phone signal can be jammed within a range of more than 100 meters outside the car. This kind of use requirement, if you want to count on low-power jammers, it is obviously unrealistic. After all, low-power interference devices have limited transmit power, and the transmit power of each frequency band is only 2-3W. The mobile phone signal strength outside the vehicle is generally at least 10dB higher than that inside the vehicle.

In most outdoor environments, if a low-power mobile phone jammer is installed outside the vehicle, its effective interference range is expected to be only 2-5 meters. In fact, only a short distance around the body can have a certain interference effect.

If you expect to use a vehicle-mounted jammer to achieve a large coverage area, you must use a high-power jamming device. Once a high-power jammer is selected, because the weight, volume and power consumption of the device increase greatly, it is necessary to install a high-power jammer. At the same time, the modification of the vehicle, the erection of the antenna and the power modification of the vehicle must also be considered.


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