AD-18/D-2512-HP — Ultra Wideband Mobile VHF/UHF Antenna

Overview

The AD-18/D-2512-HP is an ultra-wideband mobile antenna designed for high-power VHF/UHF jamming applications across the 20 to 512 MHz frequency spectrum. Available in 200 W and 400 W continuous wave (CW) power handling versions, it is built for durability in harsh mobile environments. The antenna's three-part construction features composite radiating elements, an aluminum base with integrated matching circuitry, and a heavy-duty stainless steel shock-absorbing spring. It mounts via a standard NATO 4-hole pattern and is available with an optional integrated active GPS antenna.

Technical Summary

• Frequency Range: 20 – 512 MHz
• Power Handling: 200 W CW (AD-18/D-2512-HP); 400 W CW (AD-18/D-2512-HP2)
• Application: High-power jamming and comms
• Mounting: 4-hole NATO standard, 4.5 in (114.3 mm) circle
• Construction: Aluminum base, stainless steel spring, composite material radiators
• Finish: Military green, two-component UV resistant paint
• Options: Integrated active GPS antenna

Operational Use Cases

The AD-18/D-2512-HP is engineered mainly for high-power electronic countermeasures (ECM) and RF jamming. Its ultra-wideband coverage and high power handling capacity make it ideal for integration into mobile platforms tasked with disrupting VHF and UHF communications.

Deployment Environments

Designed for resilience in demanding operational settings, the AD-18/D-2512-HP is suitable for deployment on tactical vehicles operating in harsh environments. Its construction features a shock-absorbing stainless steel spring, durable composite radiating elements, and UV-resistant paint to withstand vibration, impact, and prolonged outdoor exposure.

Performance Metrics

Performance is defined by exceptional power handling and broad frequency coverage.

• Frequency Coverage: 20 MHz – 512 MHz
• Power Handling (CW): 200 W (AD-18/D-2512-HP) or 400 W (AD-18/D-2512-HP2)

Setup & Portability

This antenna is designed for vehicle-mounted mobile use. Setup involves securing the antenna base to a vehicle platform using the four-hole NATO standard mounting pattern (4.5-inch circle). The antenna consists of three main components—the base, a lower radiator, and an upper radiator—for assembly. A heavy-duty stainless steel spring at the base provides shock and vibration protection during transit and operation.

Compatibility

The AD-18/D-2512-HP is compatible with vehicle platforms that utilize the standard 4-hole, 4.5-inch (114.3 mm) circle NATO mounting configuration. It is designed to interface with high-power RF systems, transmitters, and jammers operating anywhere within the 20 to 512 MHz frequency range. Versions with the integrated GPS option can provide location data to compatible onboard systems.

FAQs

• What are the most important factors for selecting an omnidirectional antenna? Key selection criteria include the intended platform (e.g., vehicle, manpack, fixed site), required frequency range, and power handling capability for transmit applications. Matching the antenna's specifications to the radio system is essential for performance and safety.
• Why is antenna power handling important? Power handling specifies the maximum continuous input power an antenna can handle without damage. Exceeding this limit can cause the antenna to fail and may reflect excessive power back to the transmitter, potentially damaging its amplifier.
• How does an omnidirectional antenna radiate? An omnidirectional antenna radiates power equally in a 360-degree horizontal (azimuth) pattern, but not in the vertical (elevation) plane. The radiation pattern is typically shaped like a donut, with less energy directed straight up or down.
• What does "ultra-wideband" mean for an antenna? An ultra-wideband antenna is designed to operate effectively across a very broad range of frequencies. This model covers the VHF and UHF bands from 20 MHz to 512 MHz, eliminating the need to switch antennas for different operational frequencies within that spectrum.

Video Notes

Request video demonstrating the ruggedness and assembly of the antenna. Key shots should include the stainless steel shock-absorbing spring, the composite material of the radiating elements, and a close-up of the NATO standard mounting base.