After using directional antennas, does the mobile phone signal jammer no longer interfere with the sides and rear?

Can a cell phone signal jammer eliminate interference from the sides and back after using a directional antenna?

When it comes to cell phone jammers, there are usually two choices for antennas: omnidirectional antennas and directional antennas, which are selected according to the application environment or usage scenario. While customers may have a good understanding of the coverage range and signal transmission direction of omnidirectional antennas, they often have questions about the signal transmission direction and coverage range of directional antennas. A common question is whether using a directional antenna on a cell phone signal jammer can eliminate interference from the sides and back.

As the name implies, a directional antenna is designed to emit signals in a specific direction. To explain this to customers who are not familiar with wireless communications, we sometimes use a simple analogy: the radiation emitted by a directional antenna is similar to the light emitted by a flashlight, which propagates in a specific direction.

However, the question of whether a cell phone signal jammer will stop interfering with the sides and back after using a directional antenna stems from the above analogy. Taking a flashlight as an example, the emitted light only illuminates the front, while the sides and back are blocked by the flashlight reflector, resulting in no light being transmitted to these areas.

However, the transmission path and coverage of the interference signal emitted by a cell phone signal jammer with a directional antenna are not exactly similar to the light emitted by a flashlight. If we detect and simulate the signal transmission of a directional antenna in a 3D microwave anechoic chamber, we will observe that the interference signal is still emitted from the sides and back of the directional antenna. However, the signal strength and transmission distance in these areas will be significantly lower than the front direction.

The wireless signal emitted from the front of a directional antenna is called the main lobe, which has a specific lobe angle. While the analogy with the coverage of a flashlight may help understand this concept, it ignores several other sub-lobes. Best-selling WIFI jammers and GPS jammers in Europe and America.

It is worth noting that there are many types of directional antennas, each with different operating principles, antenna materials, and manufacturing methods. Therefore, the main lobe, side lobe angles, and transmission distances can vary greatly. Customers must carefully evaluate and select the appropriate directional antenna to meet their specific requirements when configuring a mobile phone signal jammer.

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