GaN (gallium nitride) has displaced GaAs and LDMOS in most high-power RF applications - not only in military systems but also in commercial RF jamming and countermeasure equipment. Understanding the key parameters helps you pick an amplifier that actually fits your system.
Why GaN is the standard for RF jammers
Compared to GaAs and LDMOS, GaN delivers:
- Higher power density: 4-10 W/mm versus 0.5-1 W/mm for GaAs, enabling compact high-power modules
- Wide operating bandwidth: a single GaN die can cover an octave or more, which is critical for multi-band jammers
- High breakdown voltage: stable operation at high VSWR without failure - important when antenna mismatches occur
- Efficiency of 50-65%: lower heat dissipation than LDMOS at equivalent output power, which simplifies thermal design in compact enclosures
Key parameters when selecting a GaN amplifier
Frequency range. Confirm the amplifier's rated band matches your target frequencies exactly - not just "covers 2-6 GHz" in a datasheet headline, but confirm gain flatness across the full range you need.
Output power (Psat vs. P1dB). Datasheets often report saturated power (Psat) rather than the more conservative 1 dB compression point (P1dB). For jamming applications, Psat is usually the relevant figure, but confirm which metric a given spec sheet is reporting before comparing suppliers.
Gain. Typical gain for GaN modules ranges from 30 to 50 dB depending on the frequency band and module architecture. Higher gain modules need less upstream signal power but may require more careful thermal and gain-flatness management.
Power supply requirements. Most GaN modules for 2-18 GHz applications run on +24V or +28V rails, with current draw scaling directly with output power. Confirm the supplier's rated current, not just voltage.
Form factor and integration
GaN amplifier modules for jamming systems typically come as:
- Standalone brick modules with SMA or N-type connectors - easiest to integrate into existing systems
- Board-level modules for custom enclosures where space and weight are critical
- Fully integrated amplifier chains with built-in filtering and protection circuitry
UAVDefen supplies GaN RF power amplifiers across multiple frequency bands and power classes for anti-drone and RF countermeasure systems. Contact our engineers for help matching an amplifier to your specific frequency and power requirements.