LP-20-100

The LP-20-100 is a theater-level, military-grade Log Periodic Dipole Antenna (LPDA) engineered for relentless directional performance across the 20–100 MHz spectrum. This low-band VHF array is a primary asset for tactical ground-to-ground communications, SINCGARS, and specialized low-frequency monitoring. Built from 6063T6 architectural aluminum and featuring a fast-deployment stud system, it delivers a stable 7 dBi gain without the use of lossy loading techniques, ensuring maximum radiation efficiency for high-power jamming and SIGINT applications.

Design: Low-Band Mastery & Rapid Logistics

The LP-20-100 is optimized for the critical spectrum where radio waves exhibit significant diffraction, allowing for reliable communication in rugged terrain.

• Full-Sized Aperture Efficiency: By utilizing full-sized radiating elements across its 7.5-meter width, the LP-20-100 maintains superior efficiency and a focused 90-degree horizontal beamwidth. This design ensures that every watt of the 1000W power capacity is projected toward the target.
• Fast Deployment System: Despite its massive physical footprint (5.35m x 7.50m), the antenna features removable, segmented elements and a stainless steel stud system. Two technicians can fully assemble the array in less than 10 minutes, facilitating rapid tactical "jumps."
• Mobile Portability: With a shipping length of only 2.74 meters, this strategic array is easily transportable in standard tactical containers, bridging the gap between fixed-site performance and mobile flexibility.

Construction: Combat-Tier Hardening

Constructed from 6063T6 architectural anodized aluminum alloy, the LP-20-100 is built for strategic longevity in active combat zones.

• Marine-Grade Durability: All hardware, including screws and bolts, is made of Type 316 marine-grade stainless steel. The entire unit is finished with a protective powder coating, providing elite resistance against salt fog and humidity in coastal environments.
• Integrated Safety: Operates at D.C. ground, providing a low-resistance discharge path for lightning and suppressing atmospheric static for a high-sensitivity "quiet" noise floor during SIGINT operations.
• Mechanical Stability: Extra spacers between support booms and a square-tube aluminum boom design ensure the antenna maintains structural integrity in winds up to 180 Km/Hr.

Technical Features

• Strategic 20–100 MHz Bandwidth: Ideal for legacy and modern tactical VHF networks.
• 1000W High Power Handling: Optimized for high-intensity Electronic Warfare (EW).
• High-Efficiency 7 dBi Gain: Consistent directional precision across the entire band.
• Fast 10-Minute Assembly: Segmented elements for streamlined tactical logistics.
• Center-Boom Mounting: Securely fits 50mm to 77mm (2-3 inch) heavy-duty masts.
• Polarization Agility: Permits both Vertical and Horizontal orientation.
• Direct Ground Protection: Integrated lightning protection and enhanced noise immunity.

Integration Guide: Dominating the Low-VHF Spectrum

1. Exploiting Ground-Wave & Diffraction

At 20–100 MHz, signals have long wavelengths that can "diffract" or wrap over hills and around obstacles.

• Tactical Diversity: While ground whips are vertical, terrain causes signal rotation. The LP-20-100’s ability to switch to horizontal polarization allows you to "find" a cleaner signal path in mountainous or heavily forested regions.

2. High-Power Jamming (EW)

Projecting 1000 Watts across the 90-degree beamwidth allows for broad-sector suppression of enemy tactical nets. The directional gain concentrates power forward, exponentially increasing your Effective Radiated Power (ERP) compared to an omnidirectional antenna.

3. Site Protection & Front-to-Back Isolation

High-power transmission requires operator safety. The 15 dB Front-to-Back ratio ensures that while 1KW is projected at the target, the monitoring team behind the boom remains shielded, protecting their own sensitive receivers.

Strategic EW & SIGINT Guide: 20–100 MHz Low-VHF Mastery

The LP-20-100 is a theater-level strategic asset designed for the 20 MHz to 100 MHz range. This spectrum is the primary home for military tactical ground networks, including SINCGARS and low-band VHF frequency-hopping radios. At these lower frequencies, radio waves exhibit unique propagation behaviors that allow for over-the-horizon communication, making the LP-20-100’s massive aperture and directional precision a mandatory requirement for tactical dominance.

1. Exploiting Ground-Wave & Diffraction

Signals in the 20–100 MHz range have long wavelengths (3 to 15 meters). These waves have the unique ability to "diffract"—literally bending over the horizon or around large obstacles like mountains and dense forests.

• The Polarization Advantage: While most tactical vehicle whips are vertically polarized, terrain and foliage cause significant signal rotation.
• Tactical Diversity: The LP-20-100 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. High-Power Jamming & J/S Ratio Optimization

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

• 1000W Strategic Power: The LP-20-100 acts as a massive directional "floodlight." Its 7 dBi gain acts as an RF magnifying glass, concentrating 1 Kilowatt of energy into a focused 90-degree 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.

3. SIGINT Sensitivity & Long-Range Intercept

The LP-20-100’s 7 dBi gain allows for the intercept of weak tactical signals from far beyond the range of standard monitoring stations.

• Distance Intercept: Every 6 dB of gain effectively doubles your reception range. The 7 dBi gain allows you to "hear" tactical nets and identify troop movements long before they enter your immediate operational area.
• Directional Triangulation: The 90-degree horizontal beamwidth acts as a powerful directional sensor. By rotating the antenna, teams can identify the exact bearing of incoming or outgoing transmissions, providing vital early warning and location data.

4. "Silent" Monitoring: D.C. Grounding & Noise Floor

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), which sounds like an electronic hiss in the receiver.

• The Solution: The LP-20-100 is D.C. Grounded. It constantly bleeds off this 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 system.

Tactical Deployment Checklist

• Rapid 10-Minute Setup: Take full advantage of the fast-deployment stud system. In modern EW, speed is survival. The LP-20-100's speed of assembly/disassembly is a key survivability feature.
• Cable Integrity: When running at 1000W, use LMR-600 or corrugated copper feeders. Standard cables will suffer dielectric breakdown or overheat at high power, leading to catastrophic VSWR failure.
• Mast Stability & Wind Load: At 38 Kgs and 7.5 meters wide, this antenna exerts significant wind load. Ensure your mast (up to 3 inches) is properly guyed. A swaying mast will cause signal "scintillation," making it harder to maintain a lock on a distant target.
• Boresight Alignment: Because the beamwidth is 90 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.