JC3-1820

The JC3-1820 is a professional-grade, ultra-compact S-Band Jammer Collinear Antenna specifically engineered for the 1800–2000 MHz spectrum. Optimized for both man-portable (man-pack) and vehicular mounting, this ruggedized aperture is a critical asset for neutralizing GSM-1800 and PCS-1900 triggers. Delivering a consistent 3 dBi gain in an exceptionally lightweight 350-gram form factor, the JC3-1820 ensures persistent 360-degree electronic protection for elite tactical units.

Design: SWaP-Optimized Tactical Dominance

The JC3-1820 is designed to meet strict SWaP (Size, Weight, and Power) requirements, making it an ideal choice for high-mobility dismounted operations.

• Ultra-Lightweight Build: At just 280 mm (11 inches) in length and weighing only 350 grams, it minimizes the physical burden on the operator while maintaining high-intensity power throughput.
• In-Phase Collinear Architecture: Large-diameter brass radiating elements are stacked vertically and fed in-phase to project a consistent omnidirectional pattern. The wide 78-degree vertical beamwidth ensures a reliable "denial bubble," effective even when the operator is running or the vehicle is traversing steep terrain.
• Stable VSWR: Utilizes specialized co-axial stub and spark gap techniques to maintain a smooth VSWR of 2:1 across the entire 200 MHz bandwidth without any field tuning.

Construction: Field-Hardened Resilience

Built for 24/7 survivability in the world’s most punishing environmental theaters.

• High-Strength Fiberglass Radome: The radiating core is fully protected by a 44 mm diameter fiberglass enclosure. This material offers excellent RF transparency and superior mechanical robustness to withstand physical impact and environmental stress.
• Military-Grade Materials: Features high-class aluminum alloy support structures and all-brass internal radiators, ensuring a quiet signal path and maximum electrical efficiency.
• Flexible Mounting Options: Specifically designed for roof-top hole installation on vehicles, direct mounting onto jammer equipment for man-pack use, or optional pole mounting for fixed-site base stations.
• MIL-SPEC Aesthetics: Supplied in Military Olive Green to maintain a low visual signature for covert and tactical operations.

EW, SIGINT & Monitoring Compatibility

• Electronic Warfare (EW): Primary defense against RCIED (Remote Controlled IED) triggers utilizing GSM-1800 and PCS-1900 frequencies.
• Signals Intelligence (SIGINT): The clean noise floor and stable gain allow for high-speed spectrum scanning and discovery of microwave tactical networking.
• Theater Awareness:

The 360-degree horizontal coverage acts as a persistent electronic "tripwire" for situational dominance.

Key Technical Characteristics

• Extreme 250W Power Capacity: One of the few ultra-compact antennas capable of managing 250 Watts of continuous-duty RF transmission.
• High Wind Stability: Aerodynamic profile rated for structural integrity in winds up to 200 Km/Hr.
• Environmental Tolerance: Operational from -30°C to +70°C, ensuring performance in arctic freezes or desert heat.
• Zero Maintenance: Factory-tuned architecture requires no periodic calibration or field adjustments.
• Input Termination: Available with N-Female or N-Male connectors to suit diverse equipment interfaces.