Signal Interference Vehicles and Their Impact on Car Signals

Understanding the Effects and Solutions for Signal Interference Vehicles

Signal interference vehicles, commonly used during important examinations like the college entrance exam in China, have recently been found to potentially disrupt car signals. This interference can result in car doors being unable to start or open. However, there is no need to worry as there are simple solutions to overcome this issue. This article aims to explore the features of signal interference vehicles, their impact on car signals, and the recommended solutions to address this problem.

Features of Signal Interference Vehicles:

Signal interference vehicles are equipped with specialized power generation and control systems, allowing them to shield frequencies between 20-6000MHz. These vehicles are designed to be compact, occupying minimal space, and producing no exhaust emissions or noise. Additionally, they are equipped with an electrically retractable roof antenna, enabling quick deployment and retraction. This feature allows the vehicle to seamlessly integrate into VIP or convoy fleets, preventing potential threats such as remote-controlled bombs. When not in use, the antenna can be hidden, facilitating other tasks. The modular design of these vehicles allows for easy adjustment of frequency bands and power levels, ensuring convenient maintenance and repair. Furthermore, signal interference vehicles are equipped with DDS modules, enabling the modification of output power and frequency bands through computer control software, including the ability to set special communication frequencies during emergencies.

Impact on Car Signals:

Signal interference vehicles can continuously shield frequencies between 20-6000MHz, which includes the frequency range used by car remote control keys. Consequently, when a signal interference vehicle is activated, car remote control keys may experience interference. However, this interference should not cause any significant concern. The electrically retractable roof antenna of the signal interference vehicle allows it to operate at speeds of up to 100 kilometers per hour, seamlessly integrating into VIP or convoy fleets to prevent potential threats. When the signal interference vehicle is not in use, the antenna can be retracted, allowing for the execution of other tasks.

Solutions for Car Signal Interference:

If your smart car key experiences interference, resulting in malfunction or reduced sensitivity, there is no need to worry. In such cases, simply use the mechanical key to manually open the car door. Place the remote control key near the one-key start switch (closest to the ignition sensor), step on the brake pedal, and then press the ignition switch. This process will allow the vehicle to start normally. It is important to note that the vehicle’s navigation system may experience delays in positioning, and the radio may temporarily lose reception due to the interference signal. However, once the vehicle moves away from the interference signal, all functions will return to normal.


Signal interference vehicles, used during important examinations, have the potential to disrupt car signals, particularly affecting the functionality of remote control keys. However, with the understanding of their features and the recommended solutions, there is no need to be overly concerned. By following the provided steps, car owners can easily overcome any signal interference issues and ensure the smooth operation of their vehicles.