GP-155-174

Overview: GP-155-174 Broadband Omnidirectional Ground Plane Antenna

The GP-155-174 is a high-performance, military-grade Broadband Ground Plane Antenna precision-engineered for the 155–174 MHz VHF band. This rugged, all-weather model is specifically designed for mission-critical applications where high efficiency and signal purity are non-negotiable. Whether utilized for high-power jamming, strategic spectrum monitoring, or tactical base station communications, the GP-155-174 provides a resilient, single-antenna solution that eliminates the need for multiple narrowband arrays and field adjustments.

Tactical Engineering & Construction

Sealed-unit architecture for zero-maintenance operation in extreme theaters. The antenna's primary radiating element is a large-diameter aluminum rod, completely enclosed within a high-tech ruggedized fiberglass radome. This ensures the internal array is 100% protected from moisture, ice, and corrosive atmospheric gases. The use of 6063T6 ultra-corrosion-resistant architectural aluminum prevents the formation of "signal cells," effectively eliminating inter-modulation—a critical requirement for high-power electronic warfare. The base consists of a heavy-duty 100 mm x 100 mm "L-type" aluminum plate for versatile and secure mounting.

Operational Efficiency

True omni-directional dominance with superior "Null Fill" performance. The GP-155-174 delivers a stable 2 dBi gain and an elite VSWR of better than 1.5:1 across the entire band. It requires no field tuning, ensuring rapid deployment readiness for quick-reaction forces. Its exceptionally wide 78-degree vertical beamwidth is optimized for consistent signal saturation, effectively eliminating communication "dead zones" at close range or varying elevations. With a robust 500-Watt power handling capacity, it is a premier source for persistent convoy protection and broadband signal denial.

Detailed Technical Features

• High-Band VHF Mastery: Precision coverage for the 155–174 MHz range, ideal for tactical military and public safety VHF communications.
• Radome-Shielded Array: Radiating elements are housed in high-strength fiberglass for absolute protection against sand abrasion and salt-fog.
• Elite Power Handling: Facilitates up to 500 Watts of continuous RF power for intense tactical broadcasting and jamming missions.
• True Omni-Directional Pattern: Delivers a perfectly symmetrical 360-degree horizontal radiation pattern for total situational awareness.
• Inter-Modulation (IM) Suppression: All-aluminum internal construction eliminates diode effects and unwanted harmonic interference.
• Compact Logistics Design: Features four removable stainless steel ground radials, allowing for a 0.55-meter shipping length.
• Marine-Grade Hardware: Every mounting fastener and all four radial elements are fabricated from Type 316 Stainless Steel.
• Standard Termination: Features a professional N-Female connector for high-reliability, low-loss signal transfer.

Detailed Environmental Features (MIL-STD-810G Hardened)

The GP-155-174 is rigorously tested to survive the most punishing theater conditions:

• Thermal Survival: Certified for High/Low Temperature extremes (Method 500.5/502.5, Procedures I & II).
• Aerodynamic Stability: Rated to withstand constant wind speeds up to 200 Km/Hr.
• Ingress & Humidity Defense: Fully functional in 95% relative humidity and resistant to high-velocity horizontal rain (Method 506.5).
• Mechanical Resilience: Tested for High-Impact Shock (Procedure IV) and Tactical Vibration (Procedure I) for vehicle-mounted or tower installations.
• Biological Defense: Treated for Fungus Resistance (Method 508.6) for long-term reliability in tropical environments.

Key Advantages, Benefits & Applications

Key Advantages:

• Boresight Pattern Stability: Ruggedized radome ensures radiation characteristics remain constant even in iced-over or high-vibration environments.
• Rapid Multi-Mission Deployment: Zero field tuning and removable components allow the system to be operational in minutes.
• Superior Null Fill: The wide vertical beamwidth ensures clear communication for ground-level units and low-flying aerial assets alike.

Key Applications:

• VVIP & Convoy Protection: Creating a persistent high-power jamming "bubble" to defeat VHF-controlled RCIED threats.
• Tactical Spectrum Monitoring: High-sensitivity intercept and scanning across the high-band VHF spectrum.
• Military & Emergency Base Stations: Ruggedized primary antenna for secure Command and Control (C2) links.
• Maritime & Coastal Security: Marine-grade materials ensure a long service life in high-salinity maritime environments.