AD-18/E-HP — Wideband Dipole Mobile Antenna

Overview

The AD-18/E-HP is a wideband dipole mobile antenna engineered for heavy-duty ground vehicle applications. Operating across the 225 to 512 MHz frequency range, this center-fed whip delivers reliable omnidirectional coverage independent of a ground plane. An optional built-in active GPS antenna is available to support precise tactical positioning.

Technical Summary

• Frequency Range: 225 - 512 MHz (UHF) and 1575.42 MHz (L-Band GPS option)
• Gain: -1 to +2 dBi
• Power Handling: 200 W CW maximum
• Polarization: Vertical (UHF) and RHCP (GPS)
• Radiator: 43 mm diameter fibreglass whip

Operational Use Cases

This antenna is primarily designed for tactical communication and positioning on ground vehicles. Its wideband UHF capabilities make it well-suited for military transceivers, while the optional integrated GPS allows for streamlined vehicle integration without requiring a separate positioning antenna.

Deployment Environments

Built for rugged mobile environments, the AD-18/E-HP features a stainless steel spring to absorb shocks and vibrations. The radiating element utilizes high-strength composite materials, and the exterior is coated with military green (RAL-6014) two-component UV-resistant paint to withstand harsh outdoor conditions.

Performance Metrics

The antenna functions as a center-fed dipole, maintaining consistent electrical characteristics without relying on the vehicle chassis as a ground plane. It handles up to 200 W of continuous wave power while providing typical omnidirectional gain between -1 and +2 dBi.

Setup & Portability

The base features a standard NATO mounting pattern with four holes evenly spaced on a 4.5-inch (114.3 mm) circle. Alternative base plate dimensions are available upon request to accommodate specific vehicle configurations.

Compatibility

The AD-18/E-HP is compatible with tactical transceivers operating in the 225 to 512 MHz band. It mounts to standard NATO 4.5-inch vehicle bases and interfaces with standard GPS receivers when the optional L-band active antenna is equipped.

FAQs

• When should a ground-plane independent dipole be used instead of a monopole? A dipole antenna does not require the mounting platform to act as a counterpoise. This provides consistent electrical characteristics on platforms that lack a continuous metallic surface.
• What is the typical gain for a wideband tactical omnidirectional antenna? Standard-sized omnidirectional antennas typically provide between 0 and 2 dBi of gain within 20 degrees of the horizon. Wideband models may exhibit lower gain near the bottom of their operating frequency range.
• How is a tactical vehicle antenna mechanically secured? Heavy-duty vehicle antennas typically utilize a standardized bolt pattern. Verify compatibility between the antenna's base plate and the vehicle's specific mounting bracket prior to installation.
• Problems we solve: how do we narrow antenna choices? Balancing operating bands, coverage needs and mounting space can make antenna selection difficult. Share those constraints with Cyntony to compare candidate antennas and identify what needs manufacturer confirmation (Our process).
• Outcomes we deliver: what did Cyntony's tactical-link field test establish? Cyntony's 2025 XTND-DIRECT field test showed how terrain, antenna height and clearance affected a specific mesh-radio link. The result informs deployment questions; it does not establish range, throughput or suitability for this product (Field-test account).

Video Notes

A video demonstrating the shock-absorbing properties of the stainless steel spring during vehicle movement would highlight the heavy-duty design. Close-ups of the NATO mounting base and optional GPS connection would also aid installation understanding.