AD-27/V190-3512 — Wideband Monopole VHF/UHF Mobile Antenna

Overview

The AD-27/V190-3512 is a wideband monopole VHF/UHF mobile antenna covering the 25 to 512 MHz frequency range. Engineered with a low profile and minimal weight, it serves light and heavy-duty military vehicles operating in tactical communications and RF jamming roles.

Technical Summary

Frequency Range	25 - 512 MHz (VHF/UHF); 1575.42 MHz (GPS optional)
Polarization	Vertical (VHF/UHF); RHC (GPS)
Maximum Power	200 W CW
Impedance	50 ohms
VSWR	< 3.5

Operational Use Cases

Primary applications include:

• RF Jamming: Capable of handling 200 W CW power for continuous wideband suppression operations.
• Tactical Communications: Provides continuous frequency coverage across tactical VHF and UHF bands on mobile platforms.

Deployment Environments

Constructed for deployment on heavy trucks and lighter wheeled military vehicles. A stainless steel spring protects the assembly by absorbing shocks and vibrations in severe physical environments, while the structure supports wind speeds up to 55 m/s (200 km/h).

Performance Metrics

• Power Handling: 200 W CW maximum
• VSWR: < 3.5 across the operational band
• Wind Survivability: 55 m/s (200 km/h)
• Gain: Primarily < 0 dB relative to a 1/4 wave monopole whip

Setup & Portability

The 2.1 kg system consists of two primary components: an aluminum and plastic base, and a black-coated conical stainless steel radiating rod. The total assembled height is 1.95 m. An optional tilting mechanism is available for adjusting the antenna's inclination radius.

Compatibility

The antenna base houses the matching circuitry and accommodates an optional built-in L1 GPS antenna.

FAQs

• How does mounting location affect a vehicle monopole antenna? Whip monopoles typically rely on the vehicle surface to act as a ground plane. Verify the installation site provides a sufficient continuous conductive area to ensure proper impedance and radiation pattern formation.
• Why might wideband omnidirectional antennas exhibit negative gain? Broad frequency coverage in a practically sized structure often results in lower gain at the lowest frequencies. Evaluate system link margins or suppression requirements against the published gain curve for the target operating band.
• How do VSWR and power ratings impact transmitter integration? The antenna must withstand the maximum continuous power of the transmitter while maintaining a sufficient impedance match. Confirm the transmitter can tolerate the specified maximum VSWR to prevent reflected power from damaging the amplifier.
• 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 brief demonstration video showing the flexibility of the stainless steel shock-absorbing spring and the adjustment of the optional tilting mechanism would assist procurement teams in evaluating mechanical ruggedness.