The purpose of the birth of drone jammers
The main purpose of drone signal jammers is to prevent drones from operating normally by jamming their signals when they enter sensitive areas or their surroundings. Typically, these sensitive areas may include military bases, government agencies, airports, and other places where drones are not allowed to fly. Drone jammer blockers interfere with GPS signals so that drones cannot receive positioning information and thus cannot continue to fly.
Interference range and calculation method
Assume that there is a drone flying at an altitude of 10 meters 300 meters away from the jammer device, and the signal jammer needs to work effectively within this range. The diagonal distance between the jammer blocker and the drone is basically the same as the horizontal distance between them, so in order to simplify the calculation, only the horizontal distance is usually discussed. Using a simple formula (without considering cable loss, signal-to-noise ratio, etc.), the effective range of the signal jammer device in the 4G interference scenario can be calculated. It should be noted that the effective range of the jammer depends on the specific scenario and conditions between the jammer device and the drone, including output power, antenna gain and height, distance, etc.
Basic Principles and Operation
A mobile jammer is an application that can detect the presence of jamming devices in the surrounding area. When a jamming device is detected, the phone will lose the ability to make calls and provide a visual or audio warning. The reaction time of the jammer is usually between 30 and 60 seconds, depending on the hardware communication part of the device. Effective jammers do not require much higher power levels than the device they wish to interfere with, and can effectively interfere with the signals of the target device using existing technology.
Practical Application of Jammer Devices
Most drones use CDMA technology to communicate. They broadcast on basically the same frequency, but each device synchronizes with the base station and transmits a different "code" so that the base station can independently decrypt these signals. However, a single malicious signal on the CDMA frequency will emit a constant noise that drowns out the communication signals next to it, causing the drone to be unable to receive and send signals normally. This jamming principle also applies to mobile phones and other communication devices, making them inoperable by interfering with their signals.
Precautions for using drone signal jammer devices
When using drone signal jammers, ensure that they are only used when legal and necessary. Abuse of signal jammers may cause interference to legitimate communications around them, so relevant laws and regulations must be followed when deploying them. In addition, choosing the model and type of jammer suitable for a specific application scenario is also key to ensuring effectiveness. Understanding and mastering the working principle and usage of jamming devices can better protect the safety of sensitive areas.