How to calculate the shielding range of radio jammer
Many customers have called to say that I need a radio jammer that can shield a radius of 50 meters, a distance of 500 meters, and a radius of one kilometer, and that it should be shielded by the three networks of China Mobile, China Unicom, and China Telecom. Is there a problem with the customer's requirements? No problem, and the specific distance requirements are also given, but can it be completed? The answer is more difficult. Why is it difficult to achieve? Aren't all the parameters of the radio jammer marked with their own shielding intervals? How many more jammers can be placed according to this distance? In fact, it is not true. The customer is not wrong, but they do not know that the shielding plan of the radio jammer is not a fixed value. How do they understand it?
The radio jammer scans from the low end frequency of the channel to the high end at a certain speed during its operation. This scanning speed can form a garbled code interference in the message signals received by the mobile phone, causing the mobile phone to fail to detect the normal microwave signal data sent from the base station. The mobile phone cannot be connected with the base station within a certain plan, so as to shield the mobile phone signals.
To put it simply, the frequency sent by the radio jammer interferes with the frequency of the mobile phone receiving the base station. It is bound to be a competition between the shield and the base station. If the transmission power of the jammer is less than the channel power transmitted to the mobile phone by the base station in the environment at that time, the shield cannot be shielded. Only when the power of the radio jammer is greater than the power transmitted to the mobile phone by the base station, can it be effectively shielded. Therefore, any shield used in different signal environments will show different shielding distances, and China Mobile, China Unicom, and China Telecom will all be different. Because the density, orientation, and power of the base stations built by the three operators cannot be the same.
That is to say, how many meters the radio jammer can shield is not only related to its transmission power, It is also related to the distance between the base stations in the environment (The base station is not only limited to the large transmission tower built on the ground, but also the signal amplification antenna on the roof and the signal amplifier made in some buildings. Another important factor is the obstacle, which will be directly blocked if it is made of metal materials. If it is a reinforced concrete solid wall, the attenuation will be less than 10 times after penetration. If it is made of wood or glass materials, the attenuation will be less after penetration.
So the next time a customer says how many meters away they want to shield, they must ask about the distance between the base stations in the environment, and whether they need to go through the wall for indoor or outdoor use. Only by understanding these, can we better choose suitable radio jammers for customers.