Does the mobile phone signal jammer no longer interfere with the sides and rear after using the directional antenna?

Due to differences in application environments or usage scenarios, the antennas configured for mobile phone jammers usually have two options: omnidirectional antennas and directional antennas. It is easier for customers to understand the coverage and signal transmission direction of omnidirectional antennas, but they do not know much about the signal transmission direction and coverage of directional antennas. Some customers will ask us directly: Will the mobile phone signal jammer no longer interfere with the sides and rear after using the directional antenna?

The so-called directional antenna, it can be seen literally that it must be directional. When explaining to some customers who are not familiar with the field of wireless communication, sometimes a vivid analogy is used, that is, the radiation emitted from the directional antenna. The wireless signal is emitted in one direction just like the light from a flashlight.

However, the reason why customers would raise such a question, wondering whether the mobile phone signal jammer will no longer interfere with the sides and rear after using the directional antenna, is precisely affected by the above analogy, because the light emitted by the flashlight , will only illuminate the front, and the sides and the back are blocked by the flashlight reflector, so no light is transmitted to this part of the area at all.

However, when the mobile phone signal jammer uses a directional antenna, the transmission path and coverage of the interference signal emitted are really not the same as the form of light transmitted by a flashlight. If the signal transmission of the directional antenna is detected and modeled in 3D through a microwave anechoic chamber, we can intuitively see that there are still interference signals continuously emitted from the sides and back of the directional antenna. It's just that the signal strength and transmission distance in this area will be significantly lower than those in the front direction.

The wireless signal emitted in the front direction of the directional antenna is called the main lobe, which has a lobe angle. In the analogy with the flashlight light, in fact, the coverage area of the main lobe is used as a similar object. , which ignores several other sublobes.

In addition, what we need to further understand is that there are many classifications of directional antennas, and the working principles, antenna materials, and manufacturing methods are also very different, which will also cause the main lobe of the directional antenna, the lobe angle of the secondary lobe, and the transmission distance. The difference is very large, and customers must carefully screen and make a choice when configuring a directional antenna for a mobile phone signal jammer.