QHA-1117

The QHA-1117 is a professional-grade, Quadrifilar Helix Circular Polarized (QHCP) High Power Omnidirectional Antenna specifically engineered for the 1100–1700 MHz spectrum. This specialized aperture provides a unified solution for the simultaneous denial or reception of all major GNSS constellations, including GPS (L1–L5), GLONASS, Galileo, IRIDIUM, and INMARSAT. Featuring a hemispherical omni-directional pattern and high-power handling capacity, the QHA-1117 is a critical asset for ground-to-air communication, satellite tracking, and high-intensity electronic warfare.

Design: Circular Polarization & Hemispherical Dominance

The QHA-1117 is optimized for mission-critical hubs that require consistent performance regardless of the orientation of the target emitter (satellites or drones).

• Quadrifilar Helix Architecture: Consists of two pairs of vertical loop radiating elements twisted into a helix. This geometry produces a high-purity circular polarization (RHCP or LHCP), which is essential for maximizing signal link with satellite constellations and defeating polarized jamming resistant receivers.
• Hemispherical Coverage: Boasting a massive 90-degree vertical beamwidth, the antenna provides "sky-ward" coverage, making it highly effective for Ground-to-Air jamming and satellite communication where the target is at high elevation angles.
• High-Power "Teflon Dielectric": Utilizes a specialized Teflon Dielectric Transmission Line to manage up to 500 Watts (up to 1KW optional) of continuous-duty RF power without thermal degradation.

Construction: MIL-SPEC Environmental Hardening

Built for survivability in the world’s most punishing theaters, from high-salinity coastal zones to high-intensity combat.

• Ruggedized ABS Radome: The internal core is fully protected by a 110 mm diameter UV-resistant ABS radome. This cylindrical enclosure provides excellent RF transparency while maintaining the mechanical robustness to withstand physical impact and wind loads of 200 Km/Hr.
• Aerospace-Grade Materials: Constructed using 6063T6 aluminum and high-class copper alloys for the radiating elements, ensuring maximum electrical efficiency and structural longevity.
• Weather-Shielded Termination: The N-Female connector is recessed just below the NATO mounting flange, ensuring the critical RF link is 100% protected from rain, ice, and dust ingress.

Strategic EW, SIGINT & Monitoring Compatibility: QHA-1117

The QHA-1117 is a specialized electromagnetic asset designed for full-spectrum dominance in the upper L-band. By utilizing a Quadrifilar Helix design, it provides a unified solution for Electronic Warfare (EW), Signals Intelligence (SIGINT), and persistent Spectrum Monitoring across the entire 1100–1700 MHz range.

1. Electronic Warfare (EW) & Electronic Attack (EA)

In Electronic Attack missions, the QHA-1117 acts as a Circularly Polarized GNSS Denial Hub. Its architecture is specifically hardened for the extreme thermal and electrical stresses of continuous-duty jamming.

• Multi-Constellation Neutralization: Engineered to simultaneously deny GPS (L1-L5), GLONASS, Galileo, and Beidou. The circular polarization (RHCP/LHCP) is critical, as it matches the polarization of satellite signals, preventing the 3 dB polarization loss typical of linear antennas.
• High-Intensity Power Projection: With a standard 500W rating (and 1KW options), this antenna can project a massive "denial bubble," saturating the sky-ward environment to protect against GPS-guided loitering munitions and tactical drones.
• Anti-Fading Protection: The quadrifilar design excels at maintaining signal integrity in multipath environments, ensuring that jamming energy remains consistent even in urban or forested terrain.

2. Signals Intelligence (SIGINT) & Electronic Support (ES)

For SIGINT operators, the QHA-1117 is a high-fidelity Hemispherical Discovery Tool. Its stable VSWR and unique radiation pattern are essential for modern digital intercept receivers. 

With a 90-degree vertical beamwidth, the antenna provides exceptional "Ground-to-Air" and "Ground-to-Satellite" coverage. It can intercept high-elevation satellite links (Iridium/Inmarsat) that standard vehicular whips might miss.

• 360-Degree Horizontal Awareness: Provides total horizontal situational awareness, acting as a primary electronic "tripwire" to alert operators to new emitters across the 1.1–1.7 GHz window.
• Clean Signal Path: The use of copper alloy radiating elements and a Teflon Dielectric Transmission Line ensures an ultra-clean signal path for detecting weak L-band transmissions.

Electrical & Mechanical Summary

Global Compliances & MIL-STD Hardening

The QHA-1117 is rigorously tested to MIL-STD-810G protocols, ensuring 24/7 survivability in front-line combat and maritime zones:

Key Advantages

• Circular Polarization Dominance: Eliminates the risk of signal "cross-polarization" fading, ensuring 100% effective link/jamming against circularly polarized satellite and drone signals.
• Massive 500W Power Capacity: High-power throughput for persistent wide-area protection, far exceeding standard tactical omni-directional antennas.
• Hemispherical Beam Profile: The 90° vertical beamwidth provides superior coverage for overhead threats compared to standard collinear antennas with narrow vertical beams.
• Ultra-Compact SWaP: At only 200 mm (8 inches), it offers a minimal visual and physical footprint, making it difficult for adversaries to identify as a high-power EW node.
• Unified GNSS Access: A single antenna replaces multiple legacy units for GPS, GLONASS, Galileo, Iridium, and Inmarsat.

Key Applications

• Full-Spectrum GNSS Denial: Neutralizing guidance systems for all major satellite navigation constellations (GPS L1-L5, GLONASS, etc.).
• Counter-UAS (C-UAS): Disrupting drone command, control, and "Return to Home" (RTH) capabilities by saturating GNSS and control frequencies.
• Satellite Communication (SATCOM): High-power mobile link for Iridium and Inmarsat data networks.
• Convoy Electronic Protection: Providing a circularly polarized electronic shield for mobile tactical units and VIP motorcades.
• Ground-to-Air Jamming: Protecting high-value assets from satellite-guided munitions and high-altitude surveillance drones.