LP-300-470

The LP-300-470 is a high-performance, military-grade UHF TETRA Band Log Periodic Dipole Antenna engineered for precision directional communication across the 300–470 MHz spectrum. Delivering a potent 11 dBi gain in a compact 0.9-meter frame, this antenna is the definitive solution for TETRA sites, ground-to-ground tactical links, and high-power jamming without the need for multiple antenna arrays. Its non-loaded, 6063T6 aluminum architecture ensures maximum radiation efficiency and extreme mechanical survivability, making it a primary asset for both strategic fixed-site and rapid-deployment mobile missions.

Design: Precision TETRA & Tactical Mastery

The LP-300-470 is optimized for the critical UHF spectrum used by public safety, emergency services, and military tactical networks.

• Elite 11 dBi Gain: By utilizing a full-sized, non-loaded array design, the antenna achieves exceptional gain and a focused 60-degree horizontal beamwidth. This allows for extreme precision in signal targeting and significantly increased range compared to standard broadband antennas.
• High-Power Strategic Variant: While the standard unit handles 500 Watts, the LPHP-300-470 variant is engineered for massive 1.5KW power handling. It utilizes specialized Times Microwave FBT-400 coaxial cables with low-density PTFE (Teflon) and DIN-Female or 1 5/8” EIA connectors to sustain intense Electronic Countermeasures (ECM).
• Compact & Rapid Logistics: With an overall length of only 900mm (36 inches) and a shipping length of 3 feet, this antenna is highly portable. It can be fully assembled by a single technician in less than 5 minutes, making it ideal for "jump" missions and rapid-response tactical setups.

Construction: Combat-Tier Hardening

Constructed from 6063T6 architectural anodized aluminum alloy, the LP-300-470 is built for a long service life in active combat zones.

• MIL-STD-810G Certified: Rigorously tested for extreme temperature, shock, vibration, humidity, and salt fog. It is specifically engineered to survive monsoon, desert, or coastal deployments.
• Marine-Grade Durability: All hardware is made of Type 316 marine-grade stainless steel. The entire array is protected by an epoxy-based Olive Green powder coating for total corrosion resistance in saline air.
• Integrated Safety: Operates at D.C. ground, providing a low-resistance discharge path for lightning and suppressing atmospheric static to ensure an ultra-quiet noise floor for sensitive SIGINT operations.

Technical Features

• Precision 300–470 MHz Coverage: Optimized for TETRA, UHF public safety, and military bands.
• Massive 1.5KW Power Handling: Optional LPHP version for high-intensity Electronic Warfare.
• High-Efficiency 11 dBi Gain: Focused directional precision for long-range intercepts.
• Rapid 5-Minute Assembly: Removable, segmented elements for streamlined tactical logistics.
• Compact Footprint: Small size (0.9m length) reduces wind loading and visual signature.
• Polarization Agility: Quick-change mounting permits both Vertical and Horizontal orientation.
• Stackable Configuration: Can be supplied in a dual-stacked combination for 14 dBi gain.

Integration Guide: Dominating the UHF Spectrum

1. Isolating TETRA & Public Safety Signals

In congested urban environments, the UHF band is crowded with background noise.

• The Precision Advantage: The focused 60-degree beamwidth of the LP-30-470 acts as a directional "spotlight." This allows an operator to isolate a specific TETRA site or tactical repeater while physically "nulling out" interference from the sides and rear.

2. Tactical Jamming (EW) Strategy

At 500W to 1.5KW, the LP-300-470 acts as a powerful directional floodlight. Its 11 dBi gain acts as an RF magnifying glass, concentrating massive energy into a focused cone, exponentially increasing your Effective Radiated Power (ERP) compared to an omnidirectional antenna.

3. Site Protection & Front-to-Back Isolation

Projecting high power requires site safety. The 18 dB Front-to-Back ratio ensures that while energy is projected at the target, the monitoring team behind the boom remains shielded from their own transmission, protecting sensitive SIGINT receivers and personnel.

EW & Monitoring Guide: 300–470 MHz UHF TETRA Dominance

The LP-300-470 is a surgical strike tool for the 300–470 MHz spectrum. This range is the operational backbone for critical infrastructure, including TETRA (Terrestrial Trunked Radio) used by emergency services, public safety networks, and military UHF ground-to-ground communications. At these frequencies, the environment is often "RF-congested," making the LP-300-470’s high gain and precision beamwidth a mandatory requirement for mission success.

1. High-Gain Directional "Spotlight"

In the UHF band, multiple transmitters often operate in close proximity. A standard wideband antenna "sees" everything, which can overwhelm a receiver with background noise and co-channel interference.

• The Precision Advantage: The 11 dBi gain and tight 60-degree horizontal beamwidth of the LP-300-470 act as an RF "spotlight." This allows an operator to isolate a specific TETRA site or tactical repeater while physically "nulling out" interference coming from the sides or rear.
• Range Extension: Every 6 dB of gain effectively doubles your reception range. With 11 dBi, this antenna can pull in weak tactical signals from distances where standard dipole antennas would only see static.

2. Defeating Urban Multipath & Polarization Rotation

UHF signals at 300–470 MHz are small enough to reflect sharply off buildings and metal structures. These reflections cause Polarization Rotation, where a vertically transmitted signal arrives at the receiver with a horizontal component.

• The "Null" Problem: Most tactical handhelds and vehicle whips are vertically polarized. If a signal reflects off a slanted roof or building face, 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-300-470 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 400 MHz emergency services trunked system), you must achieve a superior Jamming-to-Signal (J/S) ratio at the victim’s receiver.

• 1.5KW Strategic Power: With the LPHP-300-470 (1.5KW) option, this antenna becomes a formidable wide-area suppressor. Its 11 dBi gain acts as an RF "magnifying glass," concentrating massive 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 several kilometers away, even when the adversary is using high-power fixed-site transmitters.

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 antenna elements creates "Precipitation Static" (P-Static), which sounds like an electronic hiss in the receiver.

• The Solution: The LP-300-470 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

• Stackable for 14 dBi: For maximum range or high-intensity jamming, use the Dual Stacked combination. This narrows the beam further and provides a massive 14 dBi gain, essentially quadrupling your effective power density compared to a single unit.
• High-Power Cable Management: When running at 1.5KW, use the supplied Times Microwave FBT-400 cable. At these power levels, standard coax can melt or arc. Ensure all DIN-Female or 1 5/8” EIA connectors are clean and torqued to spec.
• Rapid 5-Minute Setup: Take full advantage of the removable elements. In a tactical "jump" or emergency response mission, speed is survival. Ensure the stainless steel bolts are secured to maintain VSWR stability.
• Boresight Alignment: Because the beamwidth is only 60 degrees, a 30-degree error in alignment will drop your gain by 3 dB. Use a compass to ensure the antenna is pointed exactly at the target sector for maximum intercept probability.