Focus on the Core of the Countermeasure Module: The Technical Value and Application Logic of Power Amplifiers

In the countermeasure module of anti-drone systems, electronic jamming and radio spoofing are currently the two most widely used and safest technical approaches. The implementation of both approaches highly depends on the support of power amplifiers.

The core principle of electronic jamming is to block the control links (2.4GHz/5.8GHz) and GNSS navigation links (GPS/Beidou/GLONASS) between drones and their operators by emitting high-power electromagnetic waves of specific frequency bands. This forces the drones to enter the "lost-connection protection mode", resulting in automatic return, hovering in place, or forced landing. In this process, the role of the power amplifier is crucial:

• Enhancing the jamming coverage radius: The power amplifier can amplify the power of the basic jamming signal generated by the countermeasure module several times or even dozens of times, significantly expanding the jamming range. For example, in large-area protection scenarios such as airports, high-power amplifiers can increase the jamming coverage radius from hundreds of meters to several kilometers, achieving comprehensive protection of the airport's clear zone.
• Strengthening the signal penetration capability: In complex environments (such as building obstacles and electromagnetic noise interference), the power amplifier can enhance the anti-attenuation capability of the jamming signal. This ensures that even when there are obstacles in the signal propagation path, the normal communication and navigation signals of the drone can still be effectively suppressed.
• Ensuring the stability of multi-target jamming: When multiple drones conduct "unauthorized flights" in the airspace simultaneously, the power amplifier needs to provide a continuous and stable power output for the jamming signal. This prevents some targets from "escaping" the jamming due to insufficient power, ensuring the synchronous disposal capability of the countermeasure module for multiple targets.

As a key component supplier for anti-drone defense systems, Fengqing Instruments has launched the FQPA series of power amplifier modules. With the core mission of "providing reliable radio frequency power output for government-authorized anti-drone systems", these modules have excellent performance and are suitable for countermeasure needs in multiple scenarios, making them the preferred equipment for countermeasure modules. This series of products includes two types of GaN HEMT power amplifiers: ceramic-packaged and plastic-packaged, and demonstrates outstanding advantages in wide frequency coverage, power output, and environmental adaptability.

The FQPA series of power amplifier modules have multi-dimensional performance highlights, accurately meeting the strict requirements of anti-drone systems for power devices. In terms of frequency band coverage, the product can cover the range of 400MHz-6200MHz, which fully includes the mainstream remote control frequency bands of drones (such as 2350-2550MHz), satellite navigation frequency bands (such as GNSS-related frequency bands), and the 5100-5950MHz frequency band commonly used for image transmission. A single module can achieve jamming coverage for multiple types of drones without the need for frequent device replacement, improving the operational efficiency of the system.

In terms of power output, the series of products offer flexible options, covering from 20W basic power to 200W high-power models, with clear distinctions between power types and specific scenarios: Among the plastic-packaged models, the basic model of the product with a 200MHz bandwidth in the 800-2550MHz frequency band has an output power of 20W, and the enhanced model can reach 30W. The model with a 200MHz bandwidth in the 400-2550MHz frequency band has a Continuous Wave (CW) output power of up to 50W. The ceramic-packaged models have even stronger performance: the product in the 200-390MHz frequency band has a CW output power of up to 100W, and the 800-2500MHz frequency band with a 200MHz bandwidth even offers a 200W high-power CW version, which can meet the strong suppression needs in long-distance and complex electromagnetic environments. For example, in border patrol scenarios, models with a power of 100W and above can achieve jamming coverage in a range of several kilometers, effectively preventing the intrusion of illegal drones; in the protection of airport clear zones, 50W models can cover an area of 3-5 kilometers around, accurately responding to "unauthorized flight" threats at medium and short distances.

At the same time, the product optimizes linearity through advanced pre-distortion technology, improving the out-of-band spurious emission suppression capability by more than 30%. This minimizes interference to surrounding legal communication equipment and complies with international electromagnetic compatibility standards (such as EN 301 489-1). It supports TTL level or high-speed Serial Peripheral Interface (SPI) control, achieving nanosecond-level (<100ns) switch switching, which can be seamlessly connected with the system command and control unit. This meets the core requirement of "rapid response and precise strike" for anti-drone systems, and the response time from target detection to jamming activation can be shortened to within 1 second.

To adapt to different anti-drone system architectures, the FQPA series provides more than 12 specifications and models for selection, with a compact size design that facilitates integration and deployment. For example, the 20W/30W plastic-packaged model with a 200MHz bandwidth in the 800-2550MHz frequency band has a size of only 111*37*19.5mm and a weight of less than 100g, which can be easily integrated into individual portable anti-drone equipment. The 50W ceramic-packaged model with a 200MHz bandwidth in the 400-2550MHz frequency band has a size of 120*50*18.8mm, which is suitable for vehicle-mounted mobile anti-drone systems. Although the 200W high-power ceramic-packaged model (with a 200MHz bandwidth in the 800-2500MHz frequency band) has a size of 180*90*22.8mm, its power density can reach 1.2W/cm³, making it suitable for fixed deployment in large-scale anti-drone defense systems in key areas such as airports, nuclear facilities, and dams.

In terms of environmental adaptability, the product adopts a wide-temperature design and can operate stably in the harsh temperature range of -40℃ to +70℃, with excellent low-temperature startup performance. It can reach the rated power output within 3 seconds after being powered on in an environment of -40℃. At the same time, it is equipped with an efficient heat dissipation structure (such as a combination of microchannel water cooling and heat dissipation fins), with a thermal resistance as low as 0.8℃/W, ensuring that the device temperature does not exceed 85℃ when working at full power continuously for 24 hours. The industrial-grade protection performance meets the IP65 standard, and the anti-vibration level complies with MIL-STD-883H Method 2002.10 (1000g impact). It has excellent dustproof and moisture-proof effects, and can cope with complex application environments such as field border patrols, high-humidity coastal areas, and high-temperature deserts. The Mean Time Between Failures (MTBF) of the equipment can reach more than 50,000 hours. In addition, in response to the needs of special systems, Fengqing Instruments can also provide customized design services, making personalized adjustments in terms of frequency range (such as customizing a 1.5GHz-2.0GHz narrowband version), power output (such as customizing an 80W intermediate frequency model), and interface type (such as customizing an SMA-J radio frequency interface), further enhancing the adaptability of the product to anti-drone systems.