welcome to HISEA
source:Industry News release time:2021-09-28 Article author:sznbone Popular:Prison Jamming system
The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) communicate with the base station through radio waves, and complete the transmission of data and sound with a certain baud rate and modulation method. When the mobile phone communicates, it communicates with the base station through the uplink frequency, and then transfers the signal to the mobile service switching center to realize the call. In the standby state, the mobile phone communicates with the base station through the broadcast control channel. Once there is a call demand, it will be allocated to the mobile phone service channel according to the specific conditions of the channel near the terminal through the request, so that the mobile phone can jump to the service channel to realize the call and data transmission . At the same time, wireless communication must ensure a sufficient signal-to-noise ratio in order to receive effectively and complete the communication.
According to the above working principles, the mobile phone signal jammer is generally composed of a power supply, an electronic scanning control unit, a segmented radio frequency module unit, an amplifier unit, and a transmitting antenna unit. The signal generator generates the scan signal and passes through the inverter, then enters the oscillator and modulates to mobile communicationIn the working frequency band, the power is amplified by the power amplifier and the regulator tube is used to control the power. The amplified frequency sweep signal is transmitted into the air in the form of radio waves. Because the frequency sweeping signal forms garbled interference in the message signal received by the mobile phone (increasing the ratio of noise and noise signals to the device threshold), the mobile phone cannot receive the normal data sent by the base station, so that the mobile phone cannot establish a normal connection with the base station, thereby causing the mobile phone to disconnect Base station communication network. The mobile phone shows the phenomenon of no signal and no service system in the search network, which achieves the blocking effect.
The working principle of the signal jammer is to scan from the low end frequency of the forward channel to the high end at a certain speed during the working process. The scanning speed can cause garbled interference in the message signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station and achieve the purpose of shielding the mobile phone signal. No service system and other phenomena.
The interference power of the signal jammer is fixed, and the shielding radius of the unobstructed space is determined by the path attenuation and the signal level of the receiving base station. To realize the interference of the mobile phone signal jammer to the mobile network, it is necessary to ensure that the signal field emitted by the jammer is stronger than the field strength of the mobile signal in the interference area. The closer the interference location is to the base station, the stronger the field strength, and the smaller the effective interference area, and vice versa. , The farther the interference location is from the base station, the weaker the field strength and the larger the effective interference area.
It can be seen that within a certain transmission power, the interference range depends on the field strength in the interference area, no matter how powerful the signal jammer is, as long as the transmission power is a fixed value, as the distance increases, the interference signal strength will gradually attenuate. Thereby losing the ability to interfere. The following table shows the comparison table of distance and path attenuation. Then, the theoretical coverage radius with reference value can be determined by the output channel power of the jammer, the signal level of the base station, and the coverage line gain.
Read recommendations:
High Power DDS Full Band Vehicle Military Convoy Protection Roof Mounted Jammer System 20-6000MHz
HS-T100HJ Mobile Phone WiFi Cellular 5G Security Prevention Signal Jammer
Mobile Phone Cellular Signal Booster GSM PCS Network Repeater for Garage Basement Signal Repeat
Popular recommended products
Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13High Power Handheld Signal Jammer HS-P8J
2020-09-15Portable HS-V8J High-Power DDS Jammer
2020-09-14Waterproof Portable 360 Degree Anti UAV Drone Jammer
2020-09-244G/5G Signal Jammer (14 bands)
2020-11-10Related Information
America Movil to prioritize 5G expansion across Latin America in 2025
2024-10-17How do we solve the security risks of WiFi shared networks
2021-06-12What should I pay attention to when installing and using mobile phone signal shielding equipment?
2020-09-25Cell phone signal jammer can prevent cheating in exams
2021-08-09Worried about drone invasion? The HiSea Jammer provides Anti-drone solutions.
2022-09-09The Status Quo and Misunderstandings of Prison Mobile Phone Blockers
2020-09-25Is the cell phone signal shielding cabinet suitable for use in meeting rooms?Portable Man-pack Signa
2021-09-03Detailed use of multifunctional wireless signal jammer
2020-11-16Professional shielding device to protect business secrets
2020-11-13Can't prevent recording? Record jammer to prevent recording?
2020-12-14Mobile jammer installed in a quiet library
2021-12-20In addition to price, what other factors should be considered when buying a signal jammer?
2020-09-11Prisons choose mobile phone signal jammers, should pay attention to those problems
2021-06-01How does the wireless signal jammer in the examination room realize signal shielding?
2021-04-14Information security construction, how can the recording blocker be absent
2020-12-11Mini car GPS jammer is loved by users
2020-11-21How to prevent being recorded when talking?
2021-08-25Cellphone Signal Jammer Use On Exam Centers In India
2022-01-07WiFi jammer keeps meetings ongoing
2021-06-16Factory signal jammer solution
2020-11-23Interfering products
SSA3000X Plus Series Desktop Style Spectrum Analyzers
2025-04-09HSA-Q1 Handheld RF Spectrum Analyser up to 13.44 GHz
2025-04-09Protek A734 100kHz-4.4GHz Handheld Spectrum Analyser
2025-04-09Low-altitude defense drone portable equipment
2023-11-20Mobile Phone Cellular Signal Booster GSM PCS Network Repeater for Garage Basement Signal Repeat
2023-11-092W Mobile Phone Signal Repeater 1800 2100 2600 MHz Tri-Band 33dBm Network Booster
2023-11-093G Signal Repeater Mobile Phone Signal Booster
2023-11-09Portable Signal Jammer Full Band 21 Channels 2g 3G 4G 5g Mobile Phone Network Lojack Walky Talky Signal Jammer
2023-11-01Professional all-round 360-degree recording jammer air purifier type anti-recording equipment
2023-11-01Anti Spy Remote Control Portable Audio Voice Recording Jammer up to 2m white noise to Privacy Protection
2023-11-01Recording blocker protect your voice information security,air purifier type anti-recording equipment
2023-10-312000m Detection Handheld Drone (UAS) Detection Warning Instrument Detector Dji, Autel and Fpv Drones
2023-10-27Handheld Drone/Uavs Detecter for Detecting Dji/Autel/ Fpv Drones up to 2km
2023-10-25with 2km Drone Controlled Signals WiFi Drone Signal Jammer GSM 900MHz WiFi 2.4GHz 5.8GHz Anti Drone System
2023-10-25Unique Handheld 28 Bands 27 Antennas Wi-Fi6e FM Radio GSM 3G 4G 5g Mobile Phone Jammer
2023-10-23Handheld 24 Antennas 5g Cellphone Signal Jammer with Nylon Cover
2023-10-23Convoy 12 bands RCIED Bomb Jammer
2023-10-23Vehicle Mounted Drone Detection Jamming Integrated Uav Detection, Positioning, and Countermeasures Blocking Units
2023-10-17Portable Drone Detector aeroscope mobile works offline or online can find controller pilot position detection device up to 10km
2023-10-05Vehicle Use-Signal jammer detector for uniform services
2023-09-20Anti-Theft Jammer Detector for Local Command Center
2023-09-20Portable Cellphone Jamming Detector
2023-09-19M8000 RF Signal Detector Anti Spy Tracker Wifi Camera GSM Audio Bug Sweeper
2023-09-188km Ku Band Microwave Alarm Security System Ground Surveillance Monitor/Detector/Sensor/Radar
2023-07-31Full Band Drone Jamming and Navigation Spoofing
2023-07-318kms 300MHz~6GHz RF Uav All Frequency Detection Direction Finding Equipment
2023-07-311.2G 100W anti drone module
2023-07-211.2G 50W anti drone module
2023-07-211.2G 30W anti drone module
2023-07-211.2G 10W/20W anti drone module
2023-07-21Start a conversation to know more about what we have for you…
Get in touch