LP-20-500

The LP-20-500 is a powerhouse, ultra-wideband Log Periodic Dipole Antenna (LPDA) designed for mission-critical directional communication across the 20–500 MHz spectrum. Encompassing legacy low-VHF tactical bands, SINCGARS, military aviation (UHF), and public safety frequencies, this massive 6-meter array provides a unified "single-unit" solution for theater-level operations. Its non-loaded, 6063T6 aluminum architecture ensures a peak 9 dBi gain and extreme mechanical survivability, making it the definitive choice for high-power jamming and strategic spectrum monitoring.

Design: Wide-Spectrum Mastery & Rapid Response

The LP-20-500 is engineered for operators who require "total spectrum visibility" starting from the very low end of the VHF band (20 MHz).

• Unloaded Element Efficiency: Unlike compact antennas that use lossy loading techniques to reduce size, the LP-20-500 utilizes full-sized radiating elements. This ensures a stable 9 dBi gain and maximum radiation efficiency across nearly five octaves of bandwidth.
• Rapid Tactical Response: Despite its expansive 7.5-meter width, the antenna features removable, segmented elements and a specially designed mounting arrangement. Two technicians can fully assemble the array in less than 10 minutes, making it suitable for "jump" missions and mobile command posts.
• Optimized Logistics: With a shipping length of 3.5 meters, the LP-20-500 bridges the gap between massive fixed-site arrays and portable tactical units, maintaining high performance with manageable logistics.

Construction: Industrial & Marine Hardening

Constructed from 6063T6 architectural anodized aluminum alloy, the LP-20-500 is built for strategic longevity in the world's most severe climates.

• Marine-Grade Durability: All fasteners (screws, nuts, and bolts) are made of Type 316 marine-grade stainless steel. The entire unit is finished with an electrostatic Epoxy Powder Coating for total corrosion resistance in saline coastal air.
• Integrated Safety: Operates at D.C. ground, providing a low-resistance discharge path for lightning protection and suppressing atmospheric static to ensure an ultra-quiet noise floor for sensitive surveillance.
• All-Weather Resilience: Features a wind rating of 180 Km/Hr and extra spacers between support booms to improve mechanical durability against vibration and high wind loads.

Reliability: 1000W Multi-Mission Power

With a continuous 1000 Watt power handling capacity, the LP-20-500 is robust enough for high-intensity jamming and long-range tactical backbone links. The focused 95-degree horizontal beamwidth acts as a powerful directional "floodlight," while the 14 dB Front-to-Back ratio ensures energy is focused on the target while shielding personnel behind the boom.

Technical Features

• Comprehensive 20–500 MHz Coverage: One antenna for Low-VHF, High-VHF, and UHF bands.
• High-Efficiency 9 dBi Gain: Consistent directional precision for long-range intercepts.
• 1000W High Power Handling: Optimized for electronic countermeasures (ECM).
• Fast 10-Minute Assembly: Removable, segmented elements for streamlined tactical logistics.
• Center-Boom Mounting: Securely fits 50mm to 104mm (2-4 inch) heavy-duty masts.
• Direct Ground Protection: Integrated lightning protection and enhanced noise immunity.
• Weatherproof Feed: Internal coaxial cable is sealed inside the boom to prevent moisture ingress.

Integration Guide: Dominating the Tactical Spectrum

1. Defeating Ground-Wave Fading

At 20–50 MHz, signals have long wavelengths that can "diffract" or wrap over hills. The LP-20-500's flexible mounting permits both Vertical and Horizontal orientation. In heavily forested or mountainous terrain, switching to horizontal polarization can often "find" a cleaner signal path where a standard vertical whip would fail.

2. Tactical Jamming & J/S Ratio

Projecting 1000 Watts across the wide 95-degree beamwidth allows for broad-sector suppression of enemy tactical networks. The directional gain concentrates power forward, exponentially increasing your Effective Radiated Power (ERP) compared to an omnidirectional antenna.

3. SIGINT Sensitivity

For sensitive monitoring, the D.C. Grounded design is vital. It bleeds off the "static crackle" built up by wind moving across the large elements, ensuring you can detect weak, low-power transmissions that would be buried in the static of an ungrounded system.

EW & Monitoring Guide: 20–500 MHz Strategic Multi-Band Dominance

The LP-20-500 is a theater-level asset designed for total spectrum dominance. Covering nearly five octaves, it bridges the gap between Very Low Frequency (VLF) tactical ground waves, SINCGARS VHF networks, and UHF Military Aviation/SATCOM links. At 6 meters long and 7.5 meters wide, this antenna provides the aperture size necessary to capture and project massive RF energy at the lower end of the spectrum where smaller antennas fail.

1. Exploiting Low-Band Ground-Wave & Diffraction (20–88 MHz)

At the 20–50 MHz range, signal wavelengths are massive (up to 15 meters). These waves have the unique ability to "diffract"—literally bending over the horizon or around large obstacles like mountain ranges and dense tropical forests.

• The Polarization Advantage: While most tactical vehicle whips are vertically polarized, terrain and foliage cause significant signal rotation.
• Tactical Diversity: The LP-20-500 allows operators to quickly switch to Horizontal polarization. In heavily wooded or mountainous terrain, this can often "find" a cleaner, stronger signal path that a standard vertical whip would miss entirely.

2. Mastering the 225–400 MHz Aviation & SATCOM Band

The UHF portion of the LP-20-500's range is the primary home for military air-to-ground communications and tactical satellite links.

• High-Gain Intercept: With 9 dBi of gain, this antenna can pull in weak aeronautical transmissions from aircraft at extreme distances. Every 6 dB of gain effectively doubles your reception range, allowing SIGINT teams to monitor air corridors long before targets enter the immediate operational area.
• Directional Triangulation: The 95-degree horizontal beamwidth acts as a powerful directional sensor. By rotating the antenna, teams can identify the exact bearing of incoming or outgoing aircraft, providing vital early warning data.

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

To successfully disrupt an adversary’s frequency-hopping tactical net or a UHF data link, you must achieve a superior Jamming-to-Signal (J/S) ratio at the victim’s receiver.

• 1000W Strategic Power: The LP-20-500 acts as a massive directional "floodlight." Its 9 dBi gain acts as an RF magnifying glass, concentrating 1 Kilowatt of energy into a focused cone.
• Denial of Service: By concentrating power, you saturate the victim's receiver front-end. This makes it impossible for their radio to maintain "sync" with a hopping sequence, effectively blacking out their command and control.

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

For sensitive SIGINT operations, the "Noise Floor" is the ultimate enemy. High-speed wind or dry air moving across the large elements of a 7.5-meter array creates "Precipitation Static" (P-Static).

• The Solution: The LP-20-500 is D.C. Grounded. It constantly bleeds off static charge to the mast and earth. This ensures the lowest possible noise floor, allowing you to detect low-power "hidden" transmissions or weak signals that would be buried in the static of an ungrounded antenna.

Tactical Deployment Checklist

• Rapid 10-Minute Setup: Take full advantage of the removable, segmented elements. In a tactical "jump" or mobile intercept mission, speed is survival. Ensure the stainless steel nuts and bolts are torqued to maintain VSWR stability across the 500 MHz band.
• Mast Stability & Wind Load: At 40 Kgs and 7.5 meters wide, this antenna exerts a massive wind load (1.1 Square Meters without ice). Ensure your mast (up to 4 inches) is properly guyed and stable. A swaying mast will cause signal "scintillation," making it harder to maintain a lock on a distant target.
• High-Power Cable Integrity: When running at 1000W, use LMR-600 or corrugated copper feeders. Standard cables can overheat or suffer dielectric breakdown during continuous-duty high-power jamming.
• Boresight Alignment: Because the beamwidth is 95 degrees, a 45-degree alignment error will drop your gain significantly. Use a compass to ensure the antenna is pointed exactly at the target sector for maximum intercept probability.