As a kind of electronic equipment used to block electromagnetic signals of specific frequency, vehicle borne frequency jammer is widely used in military, security, public safety and other fields. The following is a technical analysis from five dimensions: technical principles, core components, performance indicators, application scenarios and development trends:

1、 Technical Principles

The core principle of the on-board frequency jammer is to block the communication link by transmitting a strong electromagnetic signal with the same or similar frequency as the target signal to cover and suppress the communication signal within the target frequency band. Its workflow includes:

Signal scanning and recognition: the device scans the wireless signal in the environment to identify the target frequency band to be interfered (such as 2G/3G/4G/5G, Wi Fi, Bluetooth, GPS, etc.).

Signal transmission and coverage: according to the scanning results, transmit strong interference signals to cover the target frequency band.

Communication blocking: jamming signal suppresses the target signal, making the target device unable to communicate with the normal signal source.

2、 Core Components

Power amplifier module:

GaN (gallium nitride) technology is adopted for broadband power amplifier, which is characterized by high efficiency, low heat consumption and miniaturization.

For example, a device contains four types of power amplifier modules, covering the 20-120MHz, 120-530MHz, 700-2700MHz and 2-6GHz frequency bands respectively.

Control module:

The central control module based on embedded system provides overvoltage protection, overcurrent protection, standing wave protection, temperature protection and other functions.

It supports the configuration of interference parameters such as output power, frequency band selection, etc. through the touch screen or external controller.

Power supply module:

Replaceable battery pack and replaceable power module are adopted, supporting two scenarios of mobile use and fixed installation.

For example, a device can be powered by a battery pack when in mobile use, and can be powered by an AC power supply when fixed in the vehicle.

Antenna group:

It is composed of multiple groups of omnidirectional or directional antennas, covering different frequency bands.

For example, a device contains four groups of omnidirectional antennas, covering the 20-120MHz, 120-530MHz, 700-2700MHz and 3-6GHz frequency bands respectively.

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