AD-18/CF-388 — Mobile VHF/GPS Antenna

Overview

The AD-18/CF-388 is a rugged, wideband mobile VHF center-fed antenna designed for tactical communications on heavy-duty military vehicles. Operating across the 30 to 88 MHz frequency range, the system features an optional integrated GPS L1 or L1/L2 active antenna to support combined positioning and communication requirements.

Technical Summary

• Frequency Range: 30 to 88 MHz (VHF) and 1575/1227 MHz (GPS L-Band)
• Polarization: Vertical (VHF), Right Hand Circular (GPS)
• Power Handling: 10 W (CW maximum)
• Estimated Gain: -3 to +1 dBi (VHF)
• Construction: Composite radiating elements, aluminum and durable plastic base
• Finish: Military green (RAL-6014) two-component UV-resistant paint

Operational Use Cases

Designed for ground vehicle platforms, this antenna supports tactical VHF communications and positioning operations. It is ideally suited for heavy-duty military vehicles requiring simultaneous voice/data transmission capabilities and active GPS tracking.

Deployment Environments

Engineered for extremely harsh field conditions, the antenna incorporates a stainless steel shock-absorbing spring to protect against severe impacts and vibrations. Its rugged composite elements are proven to withstand MIL-STD-810 environmental standards and survive demanding oak-beam impact tests.

Performance Metrics

The antenna delivers omnidirectional VHF coverage with a gain range spanning approximately -3 to +1 dBi. It supports continuous wave (CW) power transmission up to 10 W while maintaining stable performance in demanding mobile environments.

Setup & Portability

The antenna consists of three main modular components: an antenna base, a lower radiating element, and an upper radiating element. The base features a standard NATO 4.5-inch (114.3 mm) mounting circle for straightforward mechanical integration onto compatible vehicle hardpoints.

FAQs

• How does physical size affect wideband VHF gain? Wideband omnidirectional antennas may exhibit lower gain levels at the bottom of their frequency range when their physical dimensions are constrained by structural or platform requirements.
• What factors determine an antenna's suitability for transmitter use? Verify the maximum continuous power output and the highest voltage standing wave ratio (VSWR) the transmitter can tolerate. Matching these limits prevents reflected power from damaging the system amplifier.
• What is AD-18/CF-388 — Mobile VHF/GPS Antenna used for? AD-18/CF-388 — Mobile VHF/GPS Antenna is categorized as Omni Antenna. Listed applications include Positioning, Tactical Communication.
• 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