Will the high-power signal jammer no longer interfere with the sides and rear after using a directional antenna?
Due to differences in application environments or usage scenarios, the antennas configured for high-power signal jammers usually have two options: omnidirectional antennas and directional antennas. Customers can easily understand the coverage shape of omnidirectional antennas and the direction of shielded signal transmission, but they are not very familiar with the signal transmission direction and coverage range of directional antennas. Some customers will directly ask us: Will the high-power signal jammer no longer interfere with the sides and rear after using a directional antenna?
The so-called directional antenna, as the name suggests, is definitely directional. When explaining to some customers who are not familiar with the field of wireless communications, a vivid analogy can be used: the wireless shielding signal emitted from a directional antenna is emitted in one direction just like the light from a flashlight.
However, the customer wanted to know whether the high-power signal jammer would no longer interfere with the sides and back after using the directional antenna. It was precisely because of the above analogy that the light beam in the flashlight would be only gathered to illuminate the front. Due to the blocking of the flashlight reflector, no light was transmitted to the sides and back.
However, when the high-power signal jammer uses a directional antenna, the transmission path and coverage of the interference signal emitted are not the same as the form of light transmission by the flashlight. If the signal transmission of the directional antenna is detected and 3D modeled in a microwave darkroom, we can see more intuitively that there are still interference signals continuously emitted on both sides and back of the directional antenna. It's just that the signal strength and transmission distance in this area are obviously lower than those in the front direction.
The wireless signal emitted from the front direction of the directional antenna is called the main lobe, which has a lobe angle. The analogy with the flashlight light above is actually mainly to use the coverage area of the main lobe as a similar object, which ignores several other side lobes.
In addition, we should also know that there are actually many types of directional antennas, and their working principles, antenna materials, and manufacturing methods are also very different. This will also cause the main lobe and side lobe angles, transmission distances, etc. of directional antennas to vary greatly. Customers must carefully identify and make choices when configuring directional antennas for high-power signal jammers for wifi.
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