When many people choose a shielding device, the shielding area is often a point of concern for many people, so what are the factors that affect the shielding area? Let's learn about it with topsignaljammer:
1) Output power
①The output power of the signal jammer
②The performance of the antenna radiation (the gain, directivity, etc. of the antenna)
2) How Shielding Works
Nowadays, mobile phones are all digital signals, and digital signals have strong anti-interference ability. Generally, analog signal technology is used to interfere with digital signals. Therefore, digital signals must be used to interfere with digital signals. The interference effect is very different. The shielding device using digital interference signal technology has lower power and higher efficiency than the shielding device using analog signal interference technology.
3) Indoor and outdoor are not the same
The analysis of synthesis, attenuation and reflection of indoor mobile phone signals and interference signals is very complicated.
4) Before shielding, the strength and quality of mobile phone signals in the local space have a great impact on shielding. Different mobile phones have different effects. Generally, mobile phones with strong ability to receive weak signals may not have good anti-interference effects.
5) The direction of the base station and the direction of the shielded area of the mobile phone also affect the shielding effect.
6) The characteristics of shielding distance and radio signal transmission distance. Now, the shielding distance is briefly discussed by the attenuation of radio signal transmission in free space. According to the transmission theory formula, every time the radio wave transmission distance doubles, the signal strength is attenuated by 6db (the signal power is reduced by 4 times) ).