Overview
The prison area has a total area of 92,000 square meters, with a length of 460 meters from east to west and a width of 200 meters from north to south. There is a hill outside the eastern fence. There are GSM 900MHz, GSM 900MHZ, CDMA 800MHz, 3G, 4G base stations on the top of the hill, and the base station is a straight line from the fence. The distance is about 500 meters, and other base stations are relatively far away from the prison, and the signal is weak. Covered communication signals are GSM 900MHz, GSM 900MHZ, CDMA 800MHz, 3G, 4G.5G
overall design
1. prison signal jammer shielding coverage method
1) High Power waterproof IP Remote Control 5g Cell phone jammer AAT-HPJ8-5G single-band host is used with the corresponding directional antenna, and the omnidirectional antenna is mainly used for large-area shielding coverage;
2) Use low-power multi-frequency Power Adjustable Mobile signal Jammer equipment AAT-JPA-8H-10W to supplement and strengthen some of the defective shielding leakage points within the above-mentioned high-power shielding.
2. Antenna selection principle
1) In order to reduce the impact on the unshielded interior, especially in the edge area of the prison, a directional antenna is generally used;
2) In other areas of the prison, omnidirectional antennas are generally used to expand the shielding area;
3) According to different shielding range, angle, height, length and width, etc., the height of antenna erection and other factors, reasonably select the vertical and horizontal radiation pattern and technical parameters such as gain and inclination of the antenna.
3. Selection of antenna erection position
1) Consider that the radiation direction of the shielded antenna in the effective range is as consistent as possible with the radiation direction of the base station;
2) Make full use of the obstruction of the on-site terrain and buildings to correctly select the pattern parameters of the antenna and reduce the interference to the outside world.
4. phone signal jammer Output power debugging
Adjust the shielding power reasonably according to the actual signal strength and quality of the scene to ensure the shielding effect and try to balance it as much as possible on the basis of a certain redundancy.
5. Configuration of output frequency band and spectrum
According to the actual frequency band and frequency point of the site, a combination of narrowband and wideband is adopted. The main points are strong signals from the nearest base station, which are shielded by the amplitude of the narrowband. Amplitude large bandwidth mask.
6. Prison jammer flexible combination of system modules
1) The inside of the host is composed of various modules: modules of various frequency bands can be flexibly selected in a model of the same model;
2) The host and the antenna are connected with a 50 ohm cable, the antenna can be erected in the best position, and it is free from the constraints of the host's position;
3) A host can use the power divider for multi-antenna distribution according to actual needs, saving the power of the host and expanding the shielding range;
4) An antenna can also use a combiner to combine different output signals of multiple hosts on one antenna for radiation, reducing the number of antennas and saving costs.
Schematic diagram of high-power jammer equipment installation
Schematic diagram of smaller power jammer equipment installation
