LPHP-400-3000

The LPHP-400-3000 is an elite-tier, High-Power High-Performance Log Periodic Dipole Antenna (LPDA) engineered for relentless directional coverage across the 400–3000 MHz spectrum. Protected by a heavy-duty fiberglass radome, this antenna is specifically designed for high-wattage applications, delivering up to 500 Watts of RF power. It serves as a unified solution for military UHF, GSM/LTE cellular, and S-Band data links. Its non-loaded, fully welded 6063T6 aluminum architecture ensures a peak 9 dBi gain, making it the definitive choice for high-intensity Electronic Warfare (EW), tactical jamming, and strategic spectrum monitoring.

Design: Extreme Power & Wideband Precision

The LPHP-400-3000 is built for missions that require massive energy projection across a broad frequency range without signal degradation.

• 500W High-Power Threshold: Engineered to handle an impressive 500 Watts at 3 GHz, this antenna is optimized for continuous-duty high-power jamming and backbone telemetry.
• Unloaded Element Efficiency: By avoiding lossy electrical loading, the LPHP-400-3000 maintains a stable 9 dBi gain over 95% of its bandwidth, ensuring maximum radiation efficiency from the lowest UHF bands to the highest S-Band frequencies.
• Fiberglass Radome Protection: The high-tech fiberglass enclosure is RF-transparent and structural, shielding welded elements from salt spray, acid rain, and ice. The tapered design ensures a low wind profile for stability in 200 Km/Hr winds.

Construction: Industrial & Marine Hardening

Constructed from 6063T6 architectural anodized aluminum alloy, the LPHP-400-3000 is built for a 20+ year service life in combat-tier environments.

• PIM-Free Welded Architecture: Every radiating element is fully welded to the support booms. This eliminates passive inter-modulation (PIM) and ensures the antenna remains mechanically stable even under the extreme vibration and shock typical of MIL-STD-810G testing.
• Marine-Grade Hardware: All fasteners are made of marine-grade stainless steel. The entire unit is finished with an Olive Green powder coating for superior corrosion resistance in saline coastal zones.
• Direct D.C. Grounding: The antenna operates at D.C. ground, providing a low-resistance discharge path for lightning and suppressing atmospheric static to maintain an ultra-quiet noise floor.

Technical Features

• High-Power Handling: Sustains 500W @ 3GHz for high-intensity missions.
• Wideband 400–3000 MHz Coverage: A single unit for UHF, LTE, 5G, and S-Band.
• Elite 9 dBi Gain: Focused directional precision for long-range intercepts.
• Fiberglass Radome: Ruggedized protection against environmental and visual detection.
• MIL-STD-810G Certified: Tested for extreme temperature, shock, and salt fog.
• Rear-Mount Logistics: Fast installation on 51mm (2-inch) masts without beam interference.

Integration Guide: Maximizing Signal Success

1. Defeating Urban Multipath

In city centers, signals reflect sharply off buildings. The focused 60-degree beamwidth of the LPHP-400-3000 acts as a directional spotlight, allowing an operator to isolate specific reflected paths and "null out" unwanted interference.

2. Coaxial Selection for 500W Power

At 3000 MHz, cable loss and heat generation are critical factors when running high power.

• Recommendation: Use low-loss, high-power cables like LMR-600 or corrugated copper feeders. Ensure the N-Female termination is weather-sealed with professional-grade butyl tape to prevent moisture-induced VSWR spikes.

3. Site Protection & F/B Ratio

In high-power jamming (EW) operations, "Self-Jamming" is a major risk. The 17 dB Front-to-Back ratio ensures your own team and sensitive receivers behind the antenna are shielded while you project massive power at the target.

EW & Monitoring Guide: High-Power UHF/S-Band Strategic Intercept

The LPHP-400-3000 is a heavy-duty tactical powerhouse designed for the most demanding electronic environments. Spanning from 400 MHz to 3 GHz, it covers the "High-Value Spectrum": military UHF, global cellular backbones (GSM/LTE/5G), and critical S-Band data links. In high-power operations, managing RF energy is as much about precision as it is about raw wattage.

1. Exploiting Urban Multipath & Polarization Rotation

At frequencies between 400 MHz and 3 GHz, signal wavelengths are short enough to reflect off almost any hard surface. Each reflection can cause the signal's polarization to shift or rotate entirely.

• The "Null" Problem: If a target's signal reflects off a building and arrives at your site horizontally polarized while your antenna is vertically fixed, you could experience a 20 dB signal loss—effectively losing the intercept despite the high power.
• The Strategic Scan: The 60-degree horizontal beamwidth acts as an RF "spotlight." By scanning the horizon, an operator can identify the strongest reflected path (Multipath Exploitation) rather than just pointing at the target's direct coordinates.

2. Tactical Stealth: The Fiberglass Radome Advantage

In Electronic Warfare (EW), the Fiberglass Radome serves as more than just a weather shield—it provides a critical layer of "RF Camouflage."

• Visual Deception: Without a radome, an adversary with simple optics can see the orientation and size of the internal elements. They would immediately know if you are monitoring the low-UHF band (400 MHz) or the high-S-Band (3 GHz) based on which elements are active.
• Directional Obscuration: The tapered radome hides the exact "boresight" (pointing direction) of the antenna. This makes it impossible for an opponent to determine exactly which vehicle or building your team is currently targeting.

3. High-Power Jamming & J/S Ratio Optimization

To successfully disrupt a high-speed data link or a tactical repeater, you must achieve a superior Jamming-to-Signal (J/S) ratio at the victim’s receiver.

• Power Density Focus: The 9 dBi gain acts as a "magnifying glass" for your RF energy. Instead of scattering 500 Watts in all directions, the LPHP-400-3000 focuses that energy into a tight 60-degree cone.
• Effective Radiated Power (ERP): This concentration exponentially increases your ERP. By focusing 500W with 9 dBi gain, you can successfully "drown out" an adversary's link from several kilometers away, even if they are using high-gain fixed-site transmitters.

4. "Silent" Monitoring: D.C. Grounding & Static

At 3 GHz, sensitive SIGINT receivers are highly vulnerable to "Noise Floor" elevation, which can mask low-probability-of-intercept (LPI) signals.

• Static Suppression: High-speed wind or dry air moving across the fiberglass radome creates "Precipitation Static" (P-Static). On an ungrounded antenna, this creates an electronic "hiss" that raises the noise floor.
• The Solution: The LPHP-400-3000 is D.C. Grounded. It constantly bleeds off this static charge to the mast and earth, ensuring the lowest possible noise floor for detecting "hidden" or low-power transmissions.

High-Power Tactical Deployment Checklist

• Microwave Cable Selection: At 3000 MHz (3 GHz) and 500W, cable loss and heat are your primary enemies. Use LMR-600 or corrugated copper feeders. Standard LMR-400 may overheat during continuous-duty high-power jamming at the top end of the band.
• Boresight Alignment: Because the beamwidth is 60 degrees, a 30-degree error in alignment will drop your gain significantly. Use a compass to ensure the antenna is pointed exactly at the target sector for maximum intercept probability.
• Connector Weather-Proofing: High-power connectors are extremely sensitive to moisture. A single drop of water in the N-type connector will cause a massive VSWR spike and potentially arc at 500W. Use butyl rubber tape for a primary moisture seal.
• Line-of-Sight (LOS): At these frequencies, even heavy foliage or thin plywood can attenuate the signal by 10–15 dB. Always attempt to find an elevated position with a clear optical path to the target area.