AC5-127
VHF High Gain ATC Antenna
| Model | Product Description | Frequency | Gain | Download | Enquiry | |
|---|---|---|---|---|---|---|
| AC5-127 | VHF High Gain ATC Antenna | 118-137MHz | 5 dBi |  |  |  |
The AC5-127 is a high-performance, fiberglass-enclosed omnidirectional antenna specifically engineered for the VHF Aviation Band (117.975–137 MHz). Designed for mission-critical air traffic control (ATC) sites, it provides a stable high-gain link for ground-to-air and ground-to-ground communications, ensuring reliable signal coverage across the entire aeronautical spectrum.
High-Gain Omni Performance
The AC5-127 delivers a consistent gain of 5.15 dBi (3 dBd) across the full VHF aviation band. It features a vertically stacked array of large-diameter radiating elements that concentrate RF energy into a 40-degree vertical beam-width. This focused elevation pattern ensures maximum signal reach toward aircraft at various altitudes while maintaining a perfect 360-degree horizontal coverage. Utilizing a specialized internal impedance matching technique, the antenna maintains a smooth VSWR of better than 2:1 without requiring any field tuning or adjustments.
All-Weather Durability
Engineered for the "worst-case" environmental scenarios, the antenna is housed in a heavy-duty fiberglass radome. This cylindrical enclosure protects the internal high-grade brass and 6063T6 aluminum elements from ice formation, UV radiation, and corrosive gases. The aerodynamic profile is optimized for low wind loading, allowing it to survive wind speeds of 180 Km/Hr. All mounting hardware and the skirt hub fasteners are manufactured from marine-grade stainless steel, making it an ideal choice for high-salinity coastal ATC installations.
Tactical and Logistical Efficiency
Despite its overall length of 3.10 meters, the AC5-127 is optimized for logistical ease. It features eight removable ground plane elements that can be easily assembled in the field using simple hand tools, significantly reducing the shipping volume. Efficiency is further enhanced by its high power handling capacity of 500 Watts, supporting high-traffic base stations. For long-term reliability, the N-Female termination is housed inside the mounting pipe, shielding the RF connection from moisture, humidity, and mechanical stress.
Detailed Technical Features
- Optimized Bandwidth: Full coverage of the 117.975 – 137 MHz civil aviation band with one aperture.
- Focused Signal Reach: 40° vertical half-power points maximize ground-to-air link margin.
- Clean Radiation Pattern: Vertically polarized omnidirectional pattern ensures no "dead zones" in horizontal coverage.
- High Power Density: Supports up to 500 Watts for intensive ATC broadcast requirements.
- Zero Maintenance: Factory-tuned architecture provides "plug-and-play" reliability immediately upon installation.
Detailed Mechanical Features
- Materials: High-grade Brass and 6063T6 Architectural Aluminum radiating elements.
- Enclosure: 110 mm diameter heavy-duty Fiberglass Tube for elite protection.
- Removable Ground Plane: 8-element ground system uses a stainless steel stud system for rapid field assembly.
- Secure termination: N-Female connector protected within the support pipe.
- Weight Profile: 15 Kgs (Net); 18 Kgs (Gross with mounting hardware).
- Mounting: Clamps to vertical support pipes up to 52 mm (2 inches).
Detailed Environmental Features
- Operating Window: Rated for extreme climates from -30°C to +70°C.
- High Humidity Resilience: Designed for 0 to 100% RH (non-condensing), suitable for tropical deployments.
- Ice & Wind Hardened: Radome prevents ice buildup on internal elements and sustains 180 Km/Hr wind loads.
Key Advantages
- Radome Protection: The fiberglass enclosure prevents mechanical wear and performance loss due to sand erosion or acid rain.
- Consolidated Solution: Replaces the need for multiple narrow-band antennas at busy airports.
- Corrosion Resistance: The use of stainless steel and anodized aluminum ensures a long service life in coastal environments.
Primary Applications
- Military & Civilian ATC: Primary ground-to-air voice and data link antenna.
- Aeronautical Base Stations: Fixed-site communication for regional flight information centers.
- Ground-to-Ground Relay: Establishing VHF links between airfield command hubs and mobile units.
| Specification | Value | Tactical Benefit |
|---|---|---|
| Gain | 5.15 dBi (3 dBd) | Enhances signal footprint and link reliability. |
| Wind Rating | 180 Km/Hr | Stays operational in severe storm events. |
| Construction | Fiberglass Radome | Zero-maintenance protection from ice and UV. |
| Ground Plane | Removable (8 elements) | Simplifies shipping and rapid field setup. |
Aerodynamic Engineering: The AC5-127 Omni-directional VHF Aviation Antenna is a rugged, high-gain solution engineered for mission-critical ATC ground-to-air and ground-to-ground communications. Constructed from premium 6063T6 architectural aluminum alloy and high-grade brass, the radiator is housed in a heavy-duty fiberglass radome that ensures maximum RF transparency and structural integrity against extreme wind loads. Its streamlined, cylindrical profile is specifically designed for low wind loading and ice-mitigation, while the internal cable routing provides total weatherproofing for antenna terminations. This factory-tuned, "plug-and-play" design eliminates the need for field adjustments, making it a highly efficient alternative to complex multi-antenna arrays at air traffic control sites. Precision Signal: Designed for the 117.975-137 MHz frequency band, this antenna utilizes a vertical stack of large-diameter radiating elements to maintain a constant 5+dBi gain. The integration of advanced “Impedance Matching" technology ensures a stable VSWR (Voltage Standing Wave Ratio) and superior signal consistency across the entire spectrum. For optimized logistics, the antenna features an eight-element removable ground plane system that can be quickly assembled using standard hand tools. This portable yet durable construction, complemented by marine-grade stainless steel mounting hardware, delivers high-performance reliability for maritime and terrestrial aviation infrastructure.
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