EMC issues are often a reason for restricting the export of Chinese electronic products. This article mainly introduces the sources of EMI and some very specific suppression methods.

Cell phone jammer laws vary around the world.

When you feel that you are being tracked by other people, but you don't know whether it is GPS tracking or Lojack tracking. You should think about it seriously.

This kind of shield is characterized by small size, rechargeable, easy to carry, and can work independently for several hours after charging. The pure GPS signal blocker has only 2 antennas, which only blocks the GPS signal. There are also products with 6 or 8 antennas, which can

The jammer sends signals on the same radio frequency as the cell phone and cuts off communication between the cell phone and the cell phone base station in the city. This is known as a denial of service attack. The jammer refuses to interfere with the use of the radio frequency s

Many friends have never understood how to determine the installation point of a

1: Laboratory data, the shielding range of low-power mobile phone signal jammers is 0~50 meters, and the area is about 10~250 square meters (non-fixed value, according to the distance of the site from the base station, the shielding effect is different, and the shielding range is

It needs to be decided according to the installation location and area.

1. Mobile phone detection technology The mobile phone detection technology mainly detects when the electromagnetic wave signal emitted by the mobile phone causes the electromagnetic power in the area where the mobile phone is located to increase to a set value, thereby determinin