AH-1400-16

Overview: AH-1400-16 High-Gain GPS L1 & L2 Band Helical Antenna

The AH-1400-16 is a professional-grade, Extended Range Circular Polarized Helical Antenna precision-engineered for the 1200–1600 MHz (1.2–1.6 GHz) spectrum. Delivering a potent 16 dBic gain and a high 200-Watt power handling capacity, this directional aperture is a premier solution for long-range GPS L1/L2 band applications, GNSS signal augmentation, and tactical L-band data links. By utilizing advanced helical winding and circular polarization (RHCP/LHCP), the AH-1400-16 provides unmatched signal "punch-through" and effectively eliminates multipath interference, outperforming traditional linear antennas in complex environments.

Battlefield Durability: Hardened construction materials built to survive the most punishing environmental extremes. 

The AH-1400-16 is encased in a high-strength, cylindrical ABS radome that shields the precision copper radiating elements from physical impact, ice loading, and corrosive atmospheres. Featuring marine-grade stainless steel hardware and a rugged aluminum reflector, the antenna is built to withstand winds up to 180 Km/Hr. Its resilient design ensures mission-readiness in temperatures ranging from -30°C to +70°C, finished in tactical olive green for low observability.

Operational Efficiency: Maximum power projection and signal integrity achieved through advanced RF engineering.

Efficiency is maximized by using high-purity copper radiating elements secured within the radome to prevent geometry shifts and eliminate internal RF noise. Its highly focused 28-degree beamwidth and exceptional 30 dB Front-to-Back ratio ensure that the 200W of RF power is concentrated exactly where it is needed—maximizing effective standoff distance for satellite tracking while providing extreme isolation from rearward interference and background ground noise.

Detailed Technical Features: AH-1400-16 High-Gain Helical Antenna

• L-Band & GNSS Multi-Band Mastery: Precision-engineered to cover the entire 1200–1600 MHz frequency window, providing a unified solution for GPS L1, L2, L5, GLONASS, and tactical L-band data links without the need for field tuning.
• Elite 16 dBic High-Gain Output: The extended-stub helical design concentrates RF energy into a powerful directional beam, offering superior long-range link stability and signal "punch-through" in high-interference zones.
• Circular Polarization (CP) Mastery: Available in RHCP or LHCP configurations to virtually eliminate Faraday rotation and effectively mitigate signal fading caused by multipath reflections or atmospheric conditions.
• Focused Aperture Precision: Features a highly directional 28-degree Half Power Beamwidth (HPBW) in both horizontal and vertical planes, ideal for precision target acquisition and long-distance satellite tracking.
• High-Power Capacity: Industrial-grade construction facilitates sustained 200 Watts of continuous-duty RF transmission, suitable for high-intensity GNSS augmentation and Electronic Attack (EA) missions.
• Superior Front-to-Back Isolation: Achieves an exceptional 30 dB (+/-2 dB) ratio, ensuring maximum forward energy projection while "darkening" the rear sector to protect friendly systems and minimize background noise intercept.
• Advanced Inter-Modulation Protection: High-purity enameled copper radiating elements are secured directly to the interior radome walls to maintain precise electrical geometry under extreme vibration and high-velocity wind loads.
• Dual-Axis Tactical Steering: Supplied with a specialized heavy-duty mount allowing for 360° Azimuth and 0–90° Elevation tracking for both terrestrial and orbital assets.
• Ruggedized SWaP Profile: Maintains a lightweight footprint of less than 2.5 Kgs, offering an elite gain-to-weight ratio for quick-deploy tactical masts and man-portable ground stations.
• Low VSWR Integrity: Maintains a better than 1.8:1 VSWR across the entire 400 MHz bandwidth, ensuring maximum power transfer and protecting sensitive transmitter hardware.
• Scalable Array Architecture: Fully compatible with DUAL or QUAD stacked formations using specialized power splitter/combiner harnesses for ultra-high-gain requirements.
• Extreme Weather Shielding: The high-strength ABS radome prevents ice accumulation and protects the copper radiator from sand abrasion, salt-fog corrosion, and UV degradation.

Key Advantages: AH-1400-16 Strategic Superiority

• Unrivaled GPS/GNSS Signal Penetration: By utilizing Circular Polarization (CP) technology across the 1200–1600 MHz spectrum, the AH-1400-16 effectively eliminates signal "fading" and Faraday rotation. This ensures a rock-solid link for GPS L1, L2, and GLONASS frequencies, providing superior accuracy for precision navigation and timing in electromagnetically contested environments.
• Total Multipath Rejection: Circularly polarized waves undergo a "handedness" flip upon reflection (e.g., RHCP becomes LHCP). The AH-1400-16 inherently rejects these reflected out-of-phase signals, making it the premier choice for uninterrupted communication in high-reflection zones such as urban canyons, naval decks, and metallic subterranean complexes.
• Elite 16 dBic High-Gain Output: The extended-stub helical design concentrates RF energy into a powerful, narrow beam. This allows for the recovery of weak L-band telemetry signals at extreme standoff distances and enables high-power uplinks that out-distance significantly larger and more fragile linear Yagi arrays.
• Class-Leading Front-to-Back Isolation: With an exceptional 30 dB Front-to-Back ratio, this antenna ensures that nearly all radiated energy is projected forward. This "darkens" the area behind the antenna mast, protecting friendly personnel from high-power RF exposure and preventing rear-lobe interference from compromising co-located sensitive receivers.
• Radome Feature Advantage: The high-strength cylindrical ABS radome offers near-zero signal attenuation. Its aerodynamic profile prevents the "sail effect" in high winds (180 Km/Hr rating) and features a moisture-wicking exterior that prevents ice accumulation from detuning the radiating elements in arctic or high-altitude theaters.
• Mission-Ready SWaP Profile: Weighing less than 2.5 Kgs, the AH-1400-16 offers a superior gain-to-weight ratio. It is designed for rapid deployment on man-portable tactical masts and is fully factory-tuned, requiring zero field calibration or impedance matching.

Key Applications: Mission-Critical Deployments

• GNSS Augmentation & Precision Navigation: Provides high-reliability directional reception and transmission for GPS L1/L2 and GLONASS signal augmentation, essential for precision-guided munitions, surveying, and autonomous vehicle synchronization.
• UAV Ground Control Stations (GCS): Serves as a high-gain directional command and control link for L-band tactical drones. The 16 dBic gain ensures stable, high-bitrate telemetry feeds even at maximum operational ranges and during high-vibration events.
• Electronic Warfare (EW) & GPS Jamming: Optimized for high-intensity directional jamming of L-band navigation and timing systems. The 200W power capacity allows for the surgical saturation of enemy GPS receivers at significant standoff distances to deny PNT (Positioning, Navigation, and Timing) capabilities.
• Signals Intelligence (SIGINT): The narrow 28-degree beamwidth and clean noise floor allow SIGINT operators to intercept, identify, and triangulate weak, long-range L-band telemetry and rogue tactical emitters with high angular precision.
• Subterranean & Tunnel Communications: Engineered for uninterrupted wireless links in tunnels, mines, and underground bunkers where traditional linear antennas fail due to destructive multipath interference.
• Satellite Telemetry & Ground-to-Space Links: Ideal for Ground-to-Space links for L-band satellite constellations. Its circular polarization ensures link integrity as satellites move across the horizon, eliminating signal loss due to atmospheric rotation.