APT-1327-4

The APT-1327-4 is a high-gain, wideband tactical antenna engineered to cover the complete NATO Band III+ (1350–2700 MHz) spectrum. This 1.2-meter (4-foot) grid parabolic system is the ultimate solution for long-range microwave relay where spectrum agility and environmental resilience are paramount.

Performance Features

The APT-1327-4 stands out for its impressive wideband performance, delivering a stepped isotropic gain of 21, 24, and 27 dBi across the low, mid, and high bands respectively. This high gain is concentrated into a narrow beam-width (as tight as 6 degrees at the high end), ensuring exceptional point-to-point signal focus. Designed for the modern battlefield, it allows for a rapid transition between vertical and horizontal polarization via rear-end mounting hardware. The primary feed horn is secured with a quick-fastener system, enabling a single operator to finalize the assembly and establish a link in minutes.

Durability and Construction

Constructed for longevity in hostile environments, the antenna utilizes 6063T6 architectural aluminum alloy for the reflector and support pipes. The dipole feed is protected by a completely sealed ABS housing/radome, safeguarding the radiating elements from moisture and dust. Every structural component is treated with an anti-corrosive powder coating in olive green, complemented by marine-grade stainless steel fasteners to prevent oxidation. The antenna is fully compliant with MIL-STD-810G, surviving salt fog, heavy rain, and extreme temperatures from -40°C to +80°C, while its aerodynamically optimized grid survives wind speeds up to 200 Km/Hr.

Operational Efficiency

Efficiency in the APT-1327-4 is characterized by its high interference rejection and low noise floor. A 30 dB Front-to-Back ratio and 30 dB Cross-Polarization discrimination ensure that the antenna remains "electrically quiet" to neighboring signals, which is critical in crowded electromagnetic spectrums. The integrated D.C. Ground provides a low-resistance discharge path for lightning protection and static bleed-off, maintaining signal clarity and protecting downstream radio relay hardware. Despite its large 4-foot aperture, the 12 Kg weight profile ensures it remains man-portable for rapid-response tactical teams.

The APT-1327-4 is a high-performance microwave relay solution engineered for the NATO Band III+ (1350–2700 MHz). Its design bridges the gap between lower-frequency tactical radios and high-capacity microwave links, offering extreme gain and structural resilience.

Detailed Technical Feature - RF & Electrical Performance

• Ultra-Wideband Efficiency: Specifically tuned to cover the entire 1350–2700 MHz spectrum. This "all-in-one" capability allows tactical units to operate across the full NATO Band III+ without changing antennas.
• Variable High Gain: The parabolic efficiency scales with frequency, providing:
  • 21 dBi at the Low Band (1350 MHz)
  • 24 dBi at the Mid Band (2000 MHz)
  • 27 dBi at the High Band (2700 MHz)
• Precision Beam Steering: Focuses RF energy into a narrow corridor, reducing from 13° to 6° as frequency increases. This "pencil beam" provides a high link margin for long-distance point-to-point communication.
• Signal Isolation & Purity:
  • 30 dB Front-to-Back Ratio: Blocks interference from the rear, essential for co-siting multiple antennas on a single tower.
  • 30 dB Cross-Polarization Discrimination: Ensures the antenna only "talks" to its intended horizontal or vertical counterpart, significantly reducing signal "bleed."
• High Power & Safety:
  • 150 Watts CW: Robust power handling for high-intensity relay links.
  • D.C. Grounding: The radiating element is directly grounded, providing a low-resistance path for lightning discharge and bleeding off static noise.

Detailed Mechanical Features - Structural Engineering & Materials

• Reflector Architecture: The 1.2-meter (4-foot) grid parabolic dish is constructed from 6063T6 architectural-grade aluminum alloy, offering an elite strength-to-weight ratio.
• Aerodynamic Grid Design: The reflector utilizes 12.7mm (1/2") aluminum tubes for the grid members and 25.4mm (1") tubes for the support rim. This "open" design allows high-velocity winds to pass through, reducing "wind sail" force.
• Radome Protected Feed: Unlike open-dipole designs, the APT-1327-4 features a dipole feed completely sealed inside a high-impact ABS housing (Radome). This prevents moisture ingress, ice buildup, and dust from degrading the electrical focal point.
• Marine-Grade Fasteners: All screws, nuts, and bolts are manufactured from Type 316 Stainless Steel, ensuring the mechanical joints do not seize or corrode in salt-air environments.

Tactical Versatility

• Rapid Deployment: Despite its 1.2m size, the antenna weighs only 12 Kgs and features a quick-fastener system for the primary feed horn, making it a single-operator deployment system.
• Polarization Flexibility: The mounting hardware allows for a 90-degree rotation of the feed assembly to switch between Vertical and Horizontal polarization in the field.
• Heavy-Duty Mount: The clamping hardware is designed to fit a wide variety of tactical masts, accommodating diameters from 38 mm to 77 mm (1.5" to 3").

Environmental Resilience (MIL-STD-810G)

The APT-1327-4 is built to sustain mission-critical links in the world’s most unforgiving climates:

• Extreme Wind Survival: Rated to maintain its structural integrity in winds up to 200 Km/Hr.
• Anti-Corrosive Shielding: The aluminum components are treated with an Army Green epoxy-based powder coating, resistant to UV radiation and chemical exposure.
• Temperature Tolerance: Tested to operate from -30°C to +70°C and survive storage from -40°C to +80°C.
• Ingress & Impact: Fully compliant with MIL-STD-810G for:
  • Salt Fog (Method 509.5): Essential for naval and coastal deployments.
  • Blown Rain (Method 506.5): Ensures no water ingress into the feed during monsoons.
  • Shock & Vibration (Method 516.6): Ruggedized for transport in tactical ground vehicles.

EU Environmental & Safety Compliances

To meet international regulatory and environmental safety standards for global deployment, the antenna adheres to the following:

• RoHS Compliant: Restricted use of hazardous substances (Lead, Mercury, Cadmium, etc.) in all electronic components and solder joints.
• REACH Compliant: Ensures all chemical substances used in the fiberglass radome are registered and safe for human health and the environment.
• WEEE Directive: Designed for high-end lifecycle management with recyclable aluminum and copper materials, facilitating sustainable disposal.
• CE Mark: Fully compliant with EU safety, health, and environmental protection requirements.

The APT-1327-4 is a mission-critical solution for high-capacity data links in the NATO Band III+ (1350–2700 MHz) range. By combining a 1.2-meter aperture with wideband performance, it provides a strategic "long-haul" capability that smaller portable antennas cannot match.

Key Advantages

• Continuous Wideband Coverage (1.35–2.7 GHz): The primary advantage of the APT-1327-4 is its "all-in-one" frequency agility. Tactical units can operate across the entire NATO Band III+ spectrum without swapping feed horns or reflectors. This reduces the logistical footprint and allows for rapid frequency hopping to stay ahead of electronic threats.
• High Link Margin (27 dBi Peak Gain): With a maximum gain of 27 dBi, this antenna provides the "punch" needed to overcome high atmospheric attenuation and signal fading. It is specifically designed to establish stable, high-speed microwave links over long distances where a smaller 0.6m or 0.9m antenna would suffer from frequent dropouts.
• Superior Interference Rejection: In crowded military spectrums, signal isolation is everything. The 30 dB Front-to-Back ratio and 30 dB Cross-Polarization Discrimination act as a physical filter. This allows the APT-1327-4 to be "co-sited" (placed closely) with other antennas on a single tower without causing or receiving mutual interference.
• Radome-Protected Feed Horn: Unlike open-dipole designs, the APT-1327-4’s primary feed is completely sealed inside a high-impact ABS radome. This ensures the focal point of the antenna is protected from ice buildup, nesting birds, and corrosive salt spray, maintaining 100% efficiency in monsoons or coastal environments.
• Single-Operator Logistics: Despite its powerful 1.2-meter diameter, the antenna weighs only 12 Kgs. The quick-fastener system allows a single operator to assemble the primary feed to the reflector and mount it to a mast in minutes, making it ideal for rapid-response tactical teams.

Key Applications

1. High-Capacity NATO Band III+ Backhaul

The APT-1327-4 is the "data pipe" for divisional headquarters. It is used to carry massive volumes of encrypted data, including real-time situational awareness (C4I), multi-channel VoIP, and high-definition ISR video between command centers and forward outposts.

2. Long-Range Over-Water Communication

The 27 dBi gain and 200 Km/Hr wind rating make this model the premier choice for maritime and island-to-island communication. It provides a stable link across open water where signal "multipath" and high winds typically degrade standard microwave equipment.

3. Coastal & Border Surveillance Data Relay

Used in fixed-station roles, the APT-1327-4 connects remote shoreline radar systems and thermal imaging cameras to central headquarters. Its MIL-STD-810G salt fog resistance ensures it can operate for decades in high-salinity coastal environments without structural failure.

4. Electronic Warfare (EW) Resilient Links

With an ultra-narrow 6-degree beam-width at the high end, the antenna focuses energy into a surgical "pencil beam." This makes the communication link extremely difficult for enemy sensors to detect from the side and provides the power density required to "burn through" active jamming attempts.

5. Rapid Restoration of Critical Infrastructure

In the event of a natural disaster or conflict where fiber optic lines are severed, a pair of APT-1327-4 antennas can be deployed on temporary masts to create a high-speed "wireless bridge," restoring vital communications to an entire region within hours.

Technical Performance Summary