CD5-300-400

The CD5-300-400 is a mission-critical, High Gain Omni-Directional Jammer Coaxial Dipole Antenna specifically engineered for the 300–400 MHz spectrum. This frequency range is a primary operational zone for military UHF communications, public safety networks, and specific remote-controlled triggers. By utilizing vertically stacked 6063T6 aluminum radiating elements and a specialized center-fed design, this antenna provides a potent 5 dBi gain in a rugged, 1.4-meter profile—making it the definitive choice for vehicular RCIED protection, base station jamming, and wideband spectrum monitoring.

Design: Balanced Gain & Tactical Precision

The CD5-300-400 is optimized for operators who require extended range in the lower UHF/upper VHF band without sacrificing the necessary vertical coverage for mobile platforms.

• Optimized 5 dBi Gain: By vertically stacking high-quality aluminum elements, the antenna achieves a 36° vertical beamwidth. This focuses the RF energy significantly more than a standard unity-gain whip, providing double the effective power density at the horizon to establish a robust "denial bubble."
• Advanced Center-Fed Architecture: The special center-fed design ensures a smooth VSWR (Better than 2.5:1) across the full 300–400 MHz bandwidth. This ensures constant superior performance and protects your transmitter's power amplifiers from thermal damage caused by reflected energy.
• Non-Tuning Reliability: Designed as an all-weather, field-ready model, it requires no field tuning or adjustments, allowing for immediate deployment in rapid-response tactical scenarios.

Construction: MIL-Standard Vehicular Hardening

Built to survive the mechanical violence of armored transit and the corrosive nature of saline or desert environments.

• NATO 4-Hole Standard: The integrated base features the industry-standard NATO 4-hole pattern. This allows for a rock-solid, rigid mount on military vehicle side-mounts or adapter base plates, ensuring the antenna remains vertical at wind speeds up to 170 Km/Hr.
• Weather-Protected Termination: The N-Female termination is fixed at the bottom of the NATO mounting base. This keeps the critical RF connection shielded from moisture ingress, salt spray, and physical snagging common in off-road maneuvers.
• ABS Radome Protection: The radiating elements are housed in a 44mm diameter, UV-resistant ABS radome. This enclosure provides 100% RF transparency while protecting the internal 6063T6 aluminum architecture from ice formation and physical impact.

Technical Features

• Targeted 300–400 MHz Coverage: Optimized for specific UHF tactical and trigger bands.
• 150W RF Power Handling: Robust enough for continuous-duty jamming and high-power transmission.
• Omni-Directional 5 dBi Gain: Expands the protection perimeter for mobile and fixed platforms.
• Balanced 36° Vertical Beam: Ideal for maintaining signal contact on rolling or uneven terrain.
• Versatile Mounting: Supports NATO interface for vehicles, pole-mounting for base stations, or bi-conical spring options.
• Marine-Grade Durability: Constructed with 6063T6 aluminum and high-strength stainless steel fasteners.

Strategic EW & SIGINT Guide: CD5-300-400 Situational Mastery

The CD5-300-400 is a "high-gain mid-tier" tactical asset designed specifically for the 300–400 MHz spectrum. While low-gain antennas have a very wide vertical beam and ultra-high-gain antennas have a beam too thin for mobile platforms, the CD5-300-400’s 5 dBi gain provides the perfect operational balance for UHF denial.

1. The Balanced "Aperture": 36-Degree Vertical Beam

The CD5-300-400 features a 36-degree vertical beamwidth. This is focused enough to provide double the effective power density of a standard whip at the horizon, yet wide enough to remain effective when the vehicle is ascending a hill or maneuvering through urban debris.

2. NATO Flange & High-Speed Survivability

The integrated NATO flange ensures the antenna remains rigidly perpendicular to the vehicle's ground plane. This prevents "signal tilt" that would otherwise lift the jamming bubble off the ground and create vulnerabilities on one side of the vehicle during high-speed transit.

3. "Silent" Monitoring: D.C. Grounding & Static Discharge

The CD5-300-400 is engineered to bleed off static charges (P-Static) to the vehicle chassis or mounting mast. This results in an ultra-low noise floor, allowing a connected receiver to detect weak "handshake" signals or low-power trigger pulses that would be buried in the static of an ungrounded antenna.

Strategic EW & SIGINT Guide: CD5-300-400 UHF Tactical Mastery

The CD5-300-400 is a "high-gain mid-tier" tactical asset designed specifically for the 300–400 MHz military UHF spectrum. In Electronic Warfare (EW), this band is a high-traffic zone for tactical data links, military air-to-ground communications, and specialized remote triggers. While unity-gain antennas (2 dBi) scatter energy too widely and ultra-high-gain antennas (>10 dBi) have beams too thin for mobile platforms, the CD5-300-400’s 5 dBi gain provides the perfect "Aperture" for modern convoy protection.

1. The Balanced "Aperture": 36-Degree Vertical Beam

In a tactical environment, the terrain is rarely flat. If an antenna's vertical beam is too thin, the signal may shoot "over" or "under" a target when the vehicle tilts on a slope.

• The 36-Degree Advantage: The CD5-300-400 features a 36-degree vertical beamwidth. This is focused enough to provide double the effective power density of a standard whip at the horizon, yet wide enough to remain effective when the vehicle is ascending a hill or maneuvering through urban debris.
• Extended Horizontal Reach: This concentrated gain ensures your "denial bubble" reaches further down the roadway, neutralizing RCIED triggers at a safer standoff distance.

2. NATO Flange & High-Speed Survivability

Convoy operations require a mounting system that can handle the sheer force of wind and the violent vibrations of armored hulls.

• NATO 4-Hole Standard: The integrated NATO flange ensures the antenna remains rigidly perpendicular to the vehicle's ground plane. At speeds up to 170 Km/Hr, this mechanical stability prevents "signal tilt," which would otherwise lift your jamming bubble off the ground and create a vulnerability on one side of the vehicle.
• Low Wind Loading: The 44mm cylindrical ABS radome is designed to minimize drag, ensuring the mast doesn't flex excessively, which keeps the 36-degree beam locked on the horizon.

3. Overcoming Passive Inter-Modulation (PIM)

In Electronic Warfare, the antenna itself can become a source of "phantom" interference if not constructed correctly.

• Fully Welded 6063T6 Architecture: All internal radiating elements in the CD5-300-400 are fully welded. Bolted or "pressure-fit" elements can loosen over time due to vehicle vibration, creating "micro-sparks" that generate PIM. The welded internal structure ensures a clean, stable RF environment—vital for detecting weak, low-power UHF pulses.
• Center-Fed Stability: The center-fed design ensures that the VSWR remains below 2.5:1 across the entire 100 MHz bandwidth, protecting your jammer’s expensive power amplifiers from thermal damage caused by reflected energy.

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

Sensitive SIGINT receivers are easily "blinded" by static electricity (P-Static) generated by wind friction across an antenna's surface.

• The Solution: The CD5-300-400 is engineered to bleed off static charges to the vehicle chassis or mounting mast. This results in an ultra-low noise floor, allowing a connected receiver to detect weak "handshake" signals or low-power trigger pulses that would be buried in the static of an ungrounded antenna.

Tactical Deployment Checklist

• Chassis Bonding: Ensure the NATO mounting plate has a clean, metal-to-metal connection with the vehicle's armor. In the 300-400 MHz range, the vehicle body acts as a critical part of the antenna's ground system.
• Cable Integrity: At these frequencies, cable loss is manageable, but for 150W jamming, LMR-400 is still recommended to ensure maximum power reaches the radiating elements without heating up the feedline.
• Spacing & Collocation: Maintain a minimum of 1 meter of separation from other VHF/UHF antennas to prevent receiver desensitization.
• Vertical Alignment: Because the beam is 36 degrees wide, ensure the antenna is mounted as vertically as possible. A 15-degree mounting error will significantly reduce the effective range on one side of the vehicle.