Illustration: UAV communication link and interference signal suppression principle schematic

Remote control link (2.4GHz) 

The "nerve center" of drone control carries the pilot's real-time control instructions for flight attitude, route planning and speed. It is the core control channel to maintain the normal flight of the drone. 

Image transmission link (5.8GHz) 

The "visual window" of the drone is responsible for transmitting real-time aerial footage and flight data. The high bandwidth requirements make it highly susceptible to interference, and if interrupted, operators will lose situational awareness. 

Core Vulnerability: The “Achilles Heel” of Open Bands 

Both links operate in the ISM open frequency band that does not require authorization, and signal transmission is completely exposed. By emitting high-power interference signals in the same frequency band, normal commands can be directly "drowned", causing complete link interruption. This is the core technical logic and key breakthrough to achieve UAV countermeasures. 

 In-depth analysis of broadband modules

01 Technical principles 

Aiming at the 2.4GHz/5.8GHz core operating frequency band of drones, it emits high-power broadband sweeping frequency noise interference signals. When the interference field strength suppresses normal communication signals, the airborne receiver cannot parse the control instructions, achieving link "blinding" and completely cutting off the two-way connection between the drone and the control end. 

02 Safety mechanism triggered 

After the link is interrupted, the drone automatically triggers the built-in safety protection protocol and executes preset procedures to ensure airspace safety: •Autonomous return: return to the take-off point according to the GPS track •Forward landing: land smoothly in the current airspace •Hover and wait: keep hovering until the signal is restored

03 Core technology advantages 

High safety: Pure electromagnetic interference without physical contact, eliminating secondary damage to people and property caused by crashes.Extremely fast response: full-domain protection is formed upon startup, without complex deployment and debugging.Wide coverage: Adaptable to most consumer-grade and industrial-grade drones on the market based on 2.4G/5.8G communications. 

01 J/S · Core Threshold 

Refers to the power ratio (dB) of the interference signal to the normal communication signal at the UAV receiving antenna end. It is the core technical threshold for judging whether interference is effective. The higher the value, the stronger the suppression effect. 

Industry standard: The qualifying line for civilian equipment is J/S ≥ 10dB (which can achieve stable link disconnection); it needs to reach 15-20dB to fight against drones with anti-interference capabilities. 

 02 Dry to dry ratio · Project implementation index 

Under the effective interference condition of J/S ≥ 10dB, the ratio of the distance between the jammer and the UAV (Rj) to the distance between the remote controller and the UAV (Rc). This is a common core indicator for product parameter labeling, project acceptance and actual deployment. 

Calculation formula: Trunk ratio = Rj (interference distance) / Rc (control distance). The smaller the ratio, it means that effective interference can be implemented at a farther safe distance, and the higher the safety. 

Application example (1:5): When the drone flies 5 kilometers away from the remote control, the jammer can effectively interfere with it from 1 kilometer away, which not only ensures the countermeasures effect, but also ensures a safe distance for the operator. 

 01 Baseband processing unit (Brain) 

Driven by a high-performance SoC (such as Goxinstone QM-R966), it is responsible for generating complex noise, frequency sweep and other interference waveforms. It is the "computing brain" of the entire module and determines the diversity and intelligence level of the interference signal. 

02 RF front-end (Converter) 

The key signal modulation hub upconverts the baseband digital signal to target interference frequency bands such as 2.4G/5.8G, completes the conversion of the signal from the digital domain to the analog radio frequency domain, and ensures accurate frequency coverage. 

03 Power Amplifier (PA) 

The "powerful engine" of the signal amplifies the weak radio frequency signal to a sufficient power level, breaks through the space transmission loss, and ensures that the interference signal has long-distance and high-intensity suppression capabilities. 

04 Patented antenna system (Radiator) 

Adopting the patented technology of Ruihua Communication's "High Power Gradient Slot Antenna" to achieve efficient radiation of radio frequency energy. Supports directional or omnidirectional coverage to maximize the utilization and accuracy of interference energy. 

Technical advantages: The deep integration of full-link localized chips and patented antenna technology achieves miniaturization, high power and wide-band coverage of the interference module, achieving industry-leading anti-interference performance indicators.