LP-130-190

The LP-130-190 is a high-gain, military-grade VHF High Band Log Periodic Dipole Antenna engineered for precision directional communication across the 130–190 MHz spectrum. This frequency range is critical for Air Traffic Control (ATC), VHF maritime services, and military tactical ground-to-air links. Built from 6063T6 architectural aluminum and featuring a high-power capacity of 2.5KW CW, this antenna is a primary asset for base station sites, SIGINT monitoring, and high-intensity jamming in severe environmental conditions.

Design: VHF Precision & Tactical Power

The LP-130-190 is optimized for operators who require "no-compromise" performance in the high-VHF spectrum without the use of lossy loading techniques.

• Massive 2.5KW Power Capacity: Engineered to handle continuous-wave (CW) power up to 2500 Watts. This makes the LP-130-190 a formidable tool for high-intensity Electronic Countermeasures (ECM) and strategic long-range broadcasting.
• Focused 9 dBi Gain: By utilizing full-sized radiating elements, the antenna achieves exceptional gain and a tight 60-degree horizontal beamwidth. This allows for surgical precision in signal targeting and significantly increased reception range compared to standard antennas.
• Rear-End Mounting Mastery: The mounting bracket is permanently welded at the rear of the boom. This ensures the 52mm (2-inch) support mast remains completely outside the radiation pattern, preventing gain degradation and pattern distortion.

Construction: Combat-Tier Hardening

Constructed from 6063T6 architectural anodized aluminum alloy, the LP-130-190 is built for a 20+ year service life in active combat zones.

• MIL-STD-810G Certified: Rigorously tested for extreme temperature, shock, vibration, and salt fog. It is specifically engineered to survive monsoon, desert, or coastal deployments where saline air is a constant threat.
• Marine-Grade Durability: All fasteners (screws, nuts, and bolts) are made of Type 316 marine-grade stainless steel. The entire unit is protected by an electrostatic Olive Green epoxy powder coating for total corrosion resistance.
• 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.

Integration Guide: Dominating the High-VHF Band

1. Ground-to-Air Precision Targeting

In the signal-dense High-VHF band, tracking specific aeronautical or tactical links requires a surgical directional focus.

• The Precision Advantage: The focused 60-degree beamwidth of the LP-130-190 acts as a directional "spotlight." This allows an operator to isolate a specific target while physically "nulling out" interference from the sides and rear.

2. Tactical Jamming (EW) Strategy

At 2.5KW, the LP-130-190 acts as a massive directional floodlight. Its 9 dBi gain acts as an RF magnifying glass, concentrating energy into a focused cone, exponentially increasing your Effective Radiated Power (ERP) compared to an omnidirectional antenna.

3. Polarization Agility

While ATC and tactical nets are typically vertical, urban reflections can rotate signals. The LP-130-190’s rear-mount bracket allows for rapid switching between Horizontal and Vertical polarization to match the incoming wave and maintain a stable link.

Strategic EW & SIGINT Guide: 130–190 MHz High-Band VHF Mastery

The LP-130-190 is a surgical strike tool for the 130–190 MHz spectrum. This range is a critical "choke point" for tactical communications, hosting VHF Military Air-to-Ground (ATC) channels, Maritime mobile services, and specialized tactical trunked networks. In a battlespace defined by dense urban signals and long-range aeronautical links, the LP-130-190’s 2.5KW power handling and 9 dBi gain provide a definitive edge.

1. High-Gain Directional "Spotlight"

In the High-VHF band, signal clarity is often compromised by co-channel interference from neighboring base stations or maritime traffic.

• The 9 dBi Advantage: The focused 60-degree horizontal beamwidth of the LP-130-190 acts as an RF "spotlight." This allows an operator to isolate a specific aircraft's transmission or a distant ground station while physically "nulling out" interference from the sides and rear.
• Range Extension: Every 6 dB of gain effectively doubles your reception range. With 9 dBi, this antenna can pull in weak tactical signals from distances where standard dipole antennas would only see static.

2. Defeating Ground-Wave Fading & Polarization Rotation

Signals at 130–190 MHz can reflect sharply off large metal structures, ships, or urban buildings. Each reflection can cause the signal's polarization to shift—a phenomenon known as Polarization Rotation.

• The "Null" Problem: Most tactical handhelds and maritime whips are vertically polarized. If a signal reflects off a slanted surface, it may arrive at your site with a significant horizontal shift. A standard vertical antenna would experience a signal dropout of up to 20 dB.
• The Tactical Solution: The LP-130-190 features a flexible mounting arrangement that allows operators to switch between Horizontal and Vertical polarization in seconds. This ensures you can match the orientation of the incoming reflected wave to maintain a stable, high-fidelity intercept.

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

To successfully disrupt a target link (e.g., a 150 MHz maritime coordination net or an aviation command link), you must achieve a superior Jamming-to-Signal (J/S) ratio at the victim’s receiver.

• 2.5KW Strategic Power: The LP-130-190 acts as a massive directional "floodlight." Its 9 dBi gain acts as an RF magnifying glass, concentrating 2,500 Watts of energy into a focused 60-degree cone.
• ERP Advantage: This concentration exponentially increases your Effective Radiated Power (ERP). You can successfully "drown out" a legitimate signal from far beyond the horizon, even when the adversary is using high-power fixed-site transmitters.

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

For sensitive SIGINT operations, the "Noise Floor" is the ultimate enemy. High-speed wind moving across antenna elements creates Precipitation Static (P-Static), which sounds like an electronic hiss in the receiver.

• The Solution: The LP-130-190 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 frequency-hopping signals that would be buried in the static of an ungrounded antenna.

Tactical Deployment Checklist

• Rear-Mount Advantage: Since the mount is at the rear of the 1.5-meter boom, you can use a standard metal mast without worrying about it distorting your signal. Ensure the mast is at least 52mm (2 inches) in diameter for stability.
• High-Power Cable Integrity: When running at 2.5KW, standard cables are a fire hazard. Use LMR-600 or corrugated copper feeders. Every 3 dB of cable loss effectively cuts your jamming power or reception sensitivity in half.
• Rapid 5-Minute Setup: Take full advantage of the removable, segmented elements. In modern EW, speed is survival. The LP-130-190's speed of assembly/disassembly is a key survivability feature for "jump" missions.
• 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.