CD-118-400
VHF UHF Broadband Coaxial Dipole Antenna
| Model | Product Description | Frequency | Gain | Download | Enquiry | |
|---|---|---|---|---|---|---|
| CD-118-400 | VHF UHF Broadband Coaxial Dipole Antenna | 118-400MHz | 3 dBi |  |  |  |
CD-118-400: High-Performance VHF/UHF Aviation Band Coaxial Dipole Antenna
The CD-118-400 is a ruggedized, wideband omni-directional antenna specifically engineered for the 118–400 MHz VHF/UHF aviation band. Designed for critical Air Traffic Control (ATC) sites, this coaxial dipole antenna provides a unified solution for ground-to-air and ground-to-ground communications. Its robust, all-weather construction allows it to replace multiple narrowband antennas, simplifying site architecture and enhancing operational reliability.
Design and Versatility
The CD-118-400 is designed for vertically polarized waves, delivering a consistent 360-degree horizontal radiation pattern. Enclosed in a high-strength ABS radome, the antenna is aerodynamically optimized for low wind loading and to minimize the accumulation of ice. A standout technical feature is the high suppression of skin current, which ensures a smooth VSWR and stable pattern integrity across the entire frequency band. This sturdy design makes it equally suitable for fixed base stations, shipboard mounting, and tactical mobile applications.
Precision Fabrication and Construction
Constructed from 6063T6 ultra-corrosion-resistant architectural aluminum alloy, the internal radiating elements are vertically stacked to maximize signal projection. The antenna integrates a specialized "Choke and Spark Gap" technique, ensuring constant superior performance and electrical stability over the entire 282 MHz bandwidth. To withstand the most aggressive environments, the antenna is supplied with Marine Grade Type 316 Stainless Steel mounting hardware and finished in a durable olive green. The N-Female termination is strategically fixed at the bottom of the mounting pipe for complete weather protection.
Optimized Performance
With a typical gain of 3 dBi and a broad vertical beam-width of 76 degrees, the CD-118-400 provides excellent signal coverage, ensuring reliable links even for aircraft at varying altitudes. It is capable of handling a substantial 500 Watts of RF power, meeting the high-demand requirements of mission-critical communication hubs. The antenna is factory-tuned for immediate "plug-and-play" deployment, requiring no field adjustments or periodic maintenance.
Key Technical Features
- Full VHF/UHF Aviation Band Coverage: Operates seamlessly across the 118–400 MHz spectrum.
- Skin Current Suppression: Advanced design ensures smooth VSWR and reliable pattern purity.
- Rugged ABS Radome: UV-resistant enclosure provides superior protection against harsh weather.
- High Power Tolerance: Supports continuous RF transmission at up to 500 Watts.
- Marine-Grade Build: 6063T6 Aluminum and 316 Stainless Steel for extreme coastal and shipboard resilience.
- Zero Field Tuning: Factory-optimized architecture requires no adjustments at the site.
- Low Wind Resistance: Cylindrical design rated for survivability in 200 Km/Hr wind speeds.
Regulatory Compliance & Standards
- CE Certified: Meets all European health, safety, and environmental protection mandates.
- RoHS Compliant: Manufactured using lead-free, environmentally friendly processes.
- WEEE Directive: Complies with EU protocols for sustainable electronic waste management.
- IP-Rated Sealing: Fully protected for operation in 0 to 95% relative humidity and extreme weather.
Key Advantages
- Inventory Consolidation: A single wideband unit replaces the need for several narrowband antennas.
- Maintenance-Free Design: Rugged construction and factory tuning ensure a long, service-free life.
- Protected Termination: Internal N-Female connector position prevents water ingress and ensures cable longevity.
- Pattern Stability: Smooth VSWR ensures consistent performance across the entire 118-400 MHz range.
Key Antenna Applications
- ATC Ground-to-Air Sites: Primary communication link for aviation towers and ground services.
- Military Aviation Comms: Reliable UHF/VHF links for defense and aerospace sectors.
- Shipboard Radio Systems: Corrosion-resistant wideband communication for naval vessels.
- Fixed Base Stations: Robust radio infrastructure for multi-channel aeronautical monitoring.
Design Features: CD-118-400 VHF/UHF aviation band coaxial dipole antenna is an omni-directional antenna for vertically polarized waves. CD-118-400 Omni-directional VHF/UHF aviation coaxial dipole antenna is rugged all weather model, enclosed in a ABS radome, uses ultra corrosion resistant aluminum alloy and does not require any field tuning or adjustments. The compact size of omni-directional coaxial dipole antenna allows easy handling, shipping and highly suitable for VHF/UHF ATC sites without having the requirement of multiple antennas. The coaxial dipole antenna features high suppression of skin current which provides the smooth VSWR over the 118-400MHz frequency band. Cylindrical enclosure is used for low wind loading and for minimal effect of ice formation on the antenna operation as well as providing an aesthetically pleasing appearance. Due to sturdy design the coaxial dipole antenna is highly suitable for fixed station application, shipboard mounting and mobile application.
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