Can the antenna of the vehicle-mounted mobile phone signal shielding device be installed inside the car for concealment?
In recent years, the demand for vehicle-mounted mobile phone signal shielding instruments has greatly increased, especially for high-power models, which have been particularly favored by police departments. However, in the vehicle modification and equipment integration stages of the equipment selection and delivery process, there is always one topic that makes people particularly tangled: Customers strongly hope that the vehicle-mounted antenna can be inconspicuous due to the consideration of concealment when performing tasks. unobtrusive, and even better not to be seen or recognized. Then the question arises: Can the antenna of the vehicle-mounted cell phone signal jammer be installed directly inside the car in order to be concealed?
The conventional construction plan is to install the antenna of the vehicle-mounted mobile phone signal shielding instrument on the top of the vehicle. The advantages of this are obvious: The first advantage is that the height of the vehicle roof is reasonably utilized. When the vehicle-mounted antenna is installed on the roof, The interference signal emitted by the antenna can obtain a larger signal coverage, and in the process of being transmitted to the surroundings, it can basically overcome the blocking effect of vehicles on other roads. The second advantage is that the installation space on the roof is relatively ample. Even if the number of antennas configured for the vehicle-mounted mobile phone signal shielding instrument reaches more than 10, the space on the roof is still enough to accommodate it. The third advantage is that an antenna tilting mechanism can be installed on the roof. When the equipment is not powered on, all the antennas can be folded down and stored.
However, the disadvantage of installing antennas on the roof of the car is also obvious. When in working condition, several antennas erected on the roof of the car will be very conspicuous, making the car-mounted mobile phone signal shielding equipment highly visible, making it too easy for the outside world to spot this at a glance. It is a special vehicle for special operations. So its concealment is almost zero.
So if the vehicle antenna is not installed on the roof of the car, but is installed entirely inside the cabin, is it feasible? The answer is very clear: This approach is extremely undesirable for three reasons: First, the carriage itself is composed of a relatively closed metal frame and metal plates. This structural feature will shield the on-board mobile phone signal from the interference signal of the instrument. The emission produces a very large attenuation effect, which is undoubtedly an artificial greatly reducing the interference performance of the interference equipment. The second reason is that the antenna is installed in the car, and the height of the antenna from the ground is also reduced a lot. The reduction in height will cause the interference signal to be easily blocked by surrounding vehicles or low objects. The third reason is that the high-power radio frequency interference signal emitted by this high-power vehicle-mounted mobile phone signal shielding instrument through the antenna is close to the antenna. The intensity of its electromagnetic radiation affects the safety of the driver and passengers inside the car. Physical health is extremely detrimental.