On July 1, 2026, the newly revised Civil Aviation Law of the People's Republic of China officially came into force, marking the first time drone supervision has been elevated to the level of a fundamental national law. Meanwhile, a complete technical system for drone countermeasures is maturing at an accelerated pace — covering precise detection to effective neutralization, it forms a full closed loop for low-altitude security defense.

 I. New Law Effective in July: Upgraded Supervision Creates Urgent Demand for Countermeasure Equipment
The new law introduces four core revisions:
1. Full-process airworthiness supervision enshrined in legislation
The regulation covers five key links of drones: design, production, import, maintenance and flight. Every drone rolling off the production line must be assigned a unique product identification code to enable lifelong traceability under the "one drone, one code" mechanism.

2. Mandatory Remote Identification (RID) enforced
All newly manufactured drones must be equipped with broadcast remote identification functions. A transition period will last until November 1, 2026; after the deadline, all non-compliant drones will be completely banned from flight.

3. Unified airspace classification standards
Micro drones are restricted to a maximum flight altitude of 50 meters, while light drones have a 120-meter height limit. Airport clearance zones (designated areas surrounding airports), military restricted zones, core areas of Party and government organs, and other zones are designated as controlled airspace.

4. Significantly harsher penalty standards
Individuals who fly drones without real-name registration may face fines of up to 20,000 yuan for serious violations; operating drones without a valid certificate incurs fines ranging from 5,000 yuan to 100,000 yuan. Those committing relatively serious illegal flights may be detained for 5 to 10 days, while severe consequences will lead to criminal liability in accordance with the law.

The new law also explicitly stipulates: "Civil airports shall possess corresponding capabilities to guard against and dispose of unmanned aerial vehicles, and shall be equipped with necessary detection and countermeasure equipment in accordance with the law."
The establishment of a three-tier penalty system — fines, detention and criminal prosecution — has fundamentally altered the risk costs of illegal unregistered drone flights ("black flights"), directly driving demand for countermeasure equipment across key industries.

II. Detection Technologies: Ensuring Every Drone Is Detectable
Detection devices act as the "eyes" of countermeasure systems, tasked with discovering, identifying and tracking target drones. Per the national standard Specifications for Classification and Grading of Unmanned Aerial Vehicle Detection and Countermeasure Equipment, detection technologies can be categorized across multiple dimensions. Four mainstream detection technologies are currently in use:
1. Radar Detection: Long-Range Wide-Area Scanning "Telescopes"
Radars actively emit electromagnetic waves and receive echo signals reflected off drone airframes to calculate a target’s distance, azimuth, altitude and velocity. Advanced radars such as phased array radars can further analyze micro-Doppler signatures generated by propeller rotation to boost identification performance for small targets.
- Advantages: Long detection range (several kilometers to over ten kilometers), high positioning accuracy, robust all-weather operation, and high technical maturity.
- Limitations: Limited detection performance against "low, slow, small" targets (low altitude, low speed, small radar cross-section); blind zones at close range; weak detection capability for drones made of non-metallic materials like plastic and composite fibers.

2. Radio Frequency Spectrum Detection: Passive Monitoring "Ears"
A passive detection method that monitors communication signals between drones and remote controllers (such as the 2.4GHz and 5.8GHz frequency bands). It identifies drone models by analyzing spectral features and calculates target positions via Time Difference of Arrival (TDOA) multi-station positioning technology.
- Advantages: No energy emission, strong concealment, high target identification accuracy.
- Limitations: Cannot detect drones operating autonomously or under radio silence.

3. Electro-Optical Detection: High-Precision Identification "Sharp Eyes"
Combines visible-light cameras (for daytime use) and infrared thermal imagers (for nighttime use) to achieve optical feature recognition and precise tracking. Visible-light cameras deliver high-resolution visual identification of drone appearances during the day, while infrared thermal imagers detect drones via thermal radiation after dark, compensating for radar blind zones at low altitudes.
- Advantages: Provides intuitive visual evidence, high positioning accuracy (error ≤ 5 meters).
- Limitations: Short detection range (typically less than 1 kilometer); degraded performance in rainy and foggy weather.

4. Acoustic Detection: Low-Cost Supplementary Solution
Identifies drones by analyzing unique acoustic signatures produced by drone rotors.
- Advantages: Low cost and easy deployment.
- Limitations: Short detection range (typically less than 300 meters), vulnerable to interference from ambient noise.

In practical deployment, a single detection method rarely achieves full-area coverage independently. Multi-source integrated detection has become an industry standard: an integrated framework of "radar for long-distance coarse screening + electro-optics for close-range precise tracking + spectrum monitoring for feature blind spot compensation" delivers blind-spot-free coverage of key zones.

III. Countermeasure Technologies: Precise Intervention Against Illegal Drone Flights
After successfully detecting and identifying threatening drones, countermeasure systems deploy corresponding disposal measures based on threat severity. Countermeasure technologies fall into two primary categories by operational nature: soft kill and hard kill.

(I) Soft Kill Technologies: Non-Physical Countermeasures
Soft kill technologies disrupt, spoof or seize control of drone flight systems via electromagnetic waves or network signals to disable drones without physical damage, making them suitable for urban environments where collateral harm must be avoided.
1. Communication Link Jamming (Radio Frequency Jamming)
The most widely adopted countermeasure method to date. It transmits high-power noise signals on the same frequency bands as remote control signals (2.4GHz/5.8GHz) to suppress or block communication links between drones and their controllers. Deprived of control commands, drones activate built-in safety protocols to automatically return home, make emergency landings in place, or hover mid-air.
Classified by jamming mode:
- Barrage jamming: Emits broadband noise to rapidly suppress wide frequency bands with fast response, yet risks interfering with legal surrounding equipment.
- Precision jamming: Leverages dynamic spectrum analysis to transmit narrowband jamming signals targeting specific frequencies of designated drone models, minimizing collateral impacts.
Typical equipment includes portable jamming guns and fixed jamming towers.

2. Navigation Signal Jamming (GNSS Jamming)
Emits interfering signals targeting frequency bands of satellite navigation systems including GPS and Beidou to block drones from receiving authentic satellite positioning signals. Without accurate positioning, drones fail to follow preset flight paths, with multi-rotor drones drifting or crashing.

3. Navigation Spoofing (GPS/GNSS Spoofing)
A more advanced technology than simple jamming. It generates and transmits fake navigation signals slightly stronger than genuine satellite signals, tricking drones into locking onto false signals and injecting erroneous positioning data. Operators can thereby guide drones to designated safe landing zones for precise interception. It features strong concealment and suits scenarios requiring zero collateral damage.

4. Protocol Cracking and Control Hijacking
Exploits vulnerabilities in the communication protocols of specific drone models to seize flight control, forcing drones to land or return home. This technology carries an extremely high technical threshold and requires reverse engineering tailored to individual drone models.

(II) Hard Kill Technologies: Physical Countermeasures
Hard kill technologies directly destroy or capture drones through physical contact or energy projection, delivering immediate and thorough neutralization effects.
1. Laser Weapons
Emit high-energy laser beams to precisely ablate critical drone components such as motors, batteries and airframes.
- Advantages: Light-speed strike and ultra-high precision.
- Disadvantages: Performance degraded by atmospheric attenuation and adverse weather; lengthy single irradiation time limits sustained combat capacity. Primarily deployed at high-security sites including military bases and vital infrastructure.

2. High-Power Microwave Weapons
Emit wide-area electromagnetic pulses to disable the electronic systems of drones en masse. Effective against drone swarms, yet plagued by high energy consumption and bulky equipment size.

3. Physical Interception (Net Capture)
Launches capture nets to entangle drone rotors and seize the aircraft intact.
- Advantages: Urban-friendly design, recoverable drones for post-incident investigation and evidence collection, low cost with wide civilian applications.
- Disadvantages: Limited effective range (typically less than 100 meters), ineffective against high-speed drones.

IV. Building an Integrated "Detection-Decision-Countermeasure" Defense System
A mature drone defense and countermeasure system organically integrates the above technical modules to form a complete closed loop of "detection – identification – tracking – disposal".
1. Detection Phase: Radars and radio scanners detect targets → electro-optical systems complete visual confirmation → acoustic sensors provide auxiliary identification
2. Decision Phase: AI algorithms assess threat levels and automatically match optimal countermeasure strategies
3. Countermeasure Phase: Jamming equipment activates signal suppression, or laser/net capture systems execute physical interception operations