LPDP-300-3000

The LPDP-300-3000 is a high-performance Dual Polarized Cross-Element Log Periodic Dipole Antenna with Radome, engineered for elite directional communication, monitoring, and jamming across the 300–3000 MHz spectrum. Enclosed in a ruggedized, military-green ABS enclosure, this antenna captures or transmits both horizontal and vertical radio signals simultaneously. It is a critical asset for Electronic Warfare (EW), SIGINT, and tactical surveillance, offering high-gain precision and environmental survival for frequencies ranging from UHF through the entire S-Band.

Design: Wideband Polarization Mastery with Environmental Shielding

The LPDP-300-3000 is designed for high-stakes environments where signal integrity must be maintained despite complex polarization shifts and harsh weather.

• Simultaneous E & H Processing: Equipped with 2 x N-Female ports, the antenna allows for concurrent handling of vertical and horizontal signals. This provides true polarization diversity, ensuring no "fading" occurs as signals rotate through the ionosphere or bounce in urban environments.
• Aero-Dynamic ABS Radome: The tapered, cylindrical radome is crafted from RF-transparent ABS. It is specifically designed to minimize wind loading and prevent ice formation, ensuring the antenna maintains its 9 dBi gain even in sub-zero or high-velocity wind conditions.
• No-Loading Integrity: By avoiding electrical loading techniques to reduce size, the LPDA maintains a consistent, high-efficiency radiation pattern across the entire 300-3000 MHz range.

Construction: Military-Grade Hardening & Stability

Built to survive the most grueling global environments, the internal array is constructed from 6063T6 architectural anodized aluminum alloy.

• Fully Welded Elements: All radiating elements are fully welded to the support booms to prevent RF inter-modulation and mechanical fatigue caused by vibration.
• Environmental Shielding: The antenna is finished in a Military Olive Green powder coating. The internal components are protected by an epoxy-based finish to resist salt spray, corrosive gases, and acid rain.
• D.C. Grounded Architecture: The entire system operates at D.C. ground, providing an integrated low-resistance path for lightning protection and suppressing atmospheric static for a "quiet" noise floor during sensitive monitoring.

Reliability: 170W Multi-Mission Power

With a 170 Watt power handling capacity (at 3GHz), the LPDP-300-3000 is robust enough for continuous-duty jamming and high-capacity data links. The 18 dB Front-to-Back ratio ensures maximum energy is focused on the target while minimizing self-interference. It is fully compliant with MIL-STD-810G for high/low temperatures, shock, vibration, humidity, and salt fog.

Technical Features

• Dual-Polarized Cross-Element Architecture: Instantaneous capture of all signal polarizations.
• Ruggedized ABS Radome: Obscures internal element orientation for tactical stealth and weather protection.
• Elite 300–3000 MHz Bandwidth: Covers UHF, GSM, LTE, and S-Band in a single directional unit.
• High-Efficiency 9 dBi Gain: Focused 65-degree beamwidth for precise signal targeting.
• 170W Continuous Duty Power: Engineered for electronic countermeasures (ECM) and strategic transmission.
• MIL-STD-810G Certified: Tested for extreme naval, desert, and tropical environmental cycles.
• Rear-Mount Installation: Permanently welded mounting fixture for rapid setup on masts up to 52mm.
• Type 316 Stainless Hardware: Total corrosion resistance for shipboard and coastal use.
• Low Wind Loading: Tapered radome design ensures stability in 200 Km/Hr winds.
• D.C. Grounded Shielding: Integrated lightning protection and high noise immunity.

EW & Monitoring Guide: Urban Multipath & Radome Stealth

In high-density urban environments, the 300–3000 MHz spectrum (covering military UHF, GSM, LTE, Wi-Fi, and S-Band data links) is a chaotic RF landscape. The LPDP-300-3000 is specifically designed to excel here by using its dual-polarized architecture and rugged radome to overcome signal fading and environmental interference.

1. Defeating Urban Multipath Fading

In a city, signals rarely travel in a straight line; they bounce off glass, steel, and concrete. This "multipath" effect causes the polarization of the signal to rotate and its phase to shift.

• The "Null" Problem: A single-polarized antenna will experience deep signal fades (up to 30 dB) when the incoming wave's polarization rotates away from the antenna's orientation.
• The Diversity Solution: By monitoring the Vertical and Horizontal ports simultaneously, your SIGINT system can perform Maximum Ratio Combining (MRC). When the signal fades on the vertical plane, it almost always "peaks" on the horizontal plane, ensuring a continuous, high-quality intercept of data bursts.

2. Tactical Stealth: The Radome Advantage

In Electronic Warfare (EW), information is as valuable as power. A standard "open" log-periodic antenna reveals its frequency range and orientation to anyone with binoculars.

• Visual Obscuration: The ABS Radome hides the internal element structure. An adversary cannot visually determine if the antenna is currently focused on 300 MHz (large elements) or 3000 MHz (small elements), nor can they see the exact polarization tilt.
• Environmental Integrity: In high-speed tactical movements, open elements can "whistle" or vibrate, creating a mechanical signature. The tapered radome is acoustically quiet and aerodynamically stable, rated for 200 Km/Hr winds.

3. SIGINT "Look-Through" & Isolation

Monitoring the 300-3000 MHz band requires high sensitivity to pick out weak tactical signals among the noise.

• Low-Noise Floor: The D.C. Grounded design and the protective radome prevent "Precipitation Static" (P-Static). During rain or wind, unshielded antennas build up static charge that raises the noise floor; the LPDP-300-3000 stays "quiet," allowing you to see signals just above the thermal limit.
• Isolation for Jamming: The 20 dB Cross-Polarization Discrimination allows you to jam a target on one polarization (e.g., Vertical) while simultaneously monitoring the environment on the other (Horizontal) with minimal interference.

4. Wideband Directional Gain (9 dBi)

The 65-degree horizontal beamwidth acts as a precision "floodlight" for the 300–3000 MHz band.

• Target Concentration: Instead of wasting 170W of jamming power in 360 degrees, the LPDP-300-3000 concentrates that energy into a narrow sector. This significantly increases the Jamming-to-Signal (J/S) ratio at the target's receiver.
• Front-to-Back Protection: The 18 dB F/B ratio is critical for protecting your own team. It ensures that while you are jamming or monitoring a target, your own communication equipment located behind the antenna remains functional and unjammed.

High-Frequency Integration Checklist

• Coaxial Selection: At 3000 MHz (3 GHz), cable loss is extreme. Use LMR-600 or higher for runs exceeding 10 meters. A 10-meter run of standard RG-58 would lose a massive portion of your power before it even reached the antenna.
• Radome Maintenance: While ABS is rugged, ensure the radome is kept free of metallic paint or heavy carbon-based dirt, which can attenuate high-frequency signals.
• Mounting Alignment: Ensure the antenna is mounted level. Because the beamwidth is only 55–65 degrees, a tilt of just 10 degrees can move the "Peak Gain" off the target, reducing your effective range.
• Connector Sealing: Use professional-grade weatherproofing. In the 3 GHz range, a single drop of water in the N-Female connector will cause a massive VSWR spike and potentially damage your 170W transmitter.