AD-55/H — UHF/SHF Dipole Antenna

Overview

The AD-55/H is a high-performance UHF/SHF center-fed dipole antenna designed for portable communication and tactical jamming applications. It operates seamlessly across the 1500 to 6000 MHz frequency range, providing broadband coverage that is electrically optimized to eliminate the need for field tuning.

Technical Summary

• Frequency Range: 1500 to 6000 MHz (L, S, and C bands)
• Polarization: Vertical
• Power Handling: Up to 50 W CW
• Antenna Type: Center-fed dipole (Omnidirectional)

Operational Use Cases

• Portable and tactical communications
• Electronic warfare and jamming systems

Deployment Environments

Engineered for rugged tactical use, this antenna is suited for handheld, manpack, and tactical platforms. It complies with stringent MIL-STD-810G environmental specifications, withstanding extreme temperature, humidity, salt fog, vibration, immersion, rain, and solar radiation.

Performance Metrics

• Gain Profile: Varies from sub-zero up to approximately 5 dBi across the band
• Tuning Requirements: None; electrically optimized for continuous operation
• Duty Cycle: Supports continuous wave (CW) transmission up to 50 W

Setup & Portability

The antenna is built with a durable connector unit and features an integrated stainless steel spring that absorbs physical impacts and ensures the antenna maintains a vertical orientation during active movement. The internal dipole radiator is further protected by a rigid plastic tube.

FAQs

• Why use a center-fed dipole rather than a monopole for tactical communications? A dipole radiates independently without requiring a conductive ground plane to operate properly. A monopole relies on an underlying conductive surface to form an electromagnetic image and achieve its specified radiation pattern.
• Does vertical polarization determine the shape of the radiation pattern? No, vertical polarization specifies the electric field orientation for signal matching. Verify the specific elevation pattern and gain variations across the target frequency band using the manufacturer's datasheet.
• How should power handling be evaluated for jamming systems? Continuous wave (CW) ratings define the maximum sustained power the antenna can safely transmit. Always verify that your transmitter's maximum continuous output and VSWR tolerances align with the antenna's specific rating across all operating frequencies.
• 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