In recent years, with the improvement of safety protection standards and the continuous improvement of emergency response plans for various emergencies, armed police or public security secret services have begun to equip high-power vehicle-mounted wireless wifi jammer one after another. When carrying out such tasks and application scenarios, it triggers a discussion on whether to choose an omnidirectional antenna or a directional antenna. Here, we will focus on the advantages and disadvantages of choosing a directional antenna for the vehicle wireless signal jammer.
According to the conventional recommendations of our manufacturers, omnidirectional antennas are usually used as the standard configuration of vehicle-mounted high-power wireless signal jammers. The directional antenna is only one of the alternative configurations.
If a directional antenna is selected, its advantages are: in the direction covered by the main lobe of the directional antenna, the effective shielding distance of the wireless signal jammer will be significantly larger than that of the omnidirectional antenna. If the direction of the main lobe is towards the front of the vehicle, after using the directional antenna, the front of the vehicle is the main coverage area of the shielding device, and the sides and rear of the vehicle will also have the effect of signal shielding within a certain distance, but The effective shielding distance will be greatly reduced compared to the front of the vehicle.
The advantages shown by the use of directional antennas, if the use scenario is: the target position is clear, only the signal shielding needs to be targeted, and at the same time, when the unnecessary impact on the outside world is not expected, then replace the vehicle wireless signal shielding device. It is very suitable to install a directional antenna.
Next, let's look at the disadvantages of using directional antennas: comparing directional antennas with omnidirectional antennas, the directional antennas will be significantly larger in size than omnidirectional antennas, which will lead to the use of wireless signal jammers and matching antennas. When the directional antenna is installed on the vehicle by modification, it will be very inconvenient for the directional antenna to fall or camouflage, and because the directional antenna is mostly in the shape of a plate, once the vehicle is running, the casing of the directional antenna will form a large windward surface. , especially in the process of high-speed driving, the wind resistance will become very large, which will put forward high requirements on the compressive performance of the wind resistance of the directional antenna and the fixed installation components of the directional antenna.
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