D2221-S Sectional Dipole Antenna
The D2221-S Sectional Dipole Antenna is a high-isolation UHF dipole antenna designed for multi-channel military communications. Operating within the 225–400 MHz frequency band, its four independent connectors allow for simultaneous operation in a single, rugged two-piece radome configuration.
Description
The D2221-S Sectional Dipole Antenna is engineered for high-performance UHF communication in military and defense environments. Covering the 225–400 MHz frequency range, this antenna features four independent radiating elements, each with a dedicated connector, allowing simultaneous operation on multiple UHF channels. Its robust fiberglass construction and two-piece sectional design make it ideal for rapid deployment, transport, and integration on tactical platforms. With high port-to-port isolation and reliable vertical polarization, the D2221-S ensures resilient and uninterrupted communications in demanding operational scenarios.
| General Specifications | |
|---|---|
| Model Name | D2221-S |
| Part Number | 99021501 |
| Antenna Type | Dipole Antenna |
| Radiation Pattern | Omni-Directional |
| Enclosure | Wound Fiberglass Radome |
| Colour | Olive Drab (RAL 6022) |
| NSN Number | 5985-01-315-5472 |
| Compliances | RoHS, REACH |
| Markets | Military & Defence, Aviation & Air Traffic |
| Electrical Specifications | |
| Frequency (MHz) | 225-400 |
| Gain - (dBi) | 2 |
| Polarization | Vertical |
| VSWR (Max) | 2:1 |
| Impedance (Ω) | 50 |
| UHF Max Input Power (W) | 250 |
| Isolation - Min. (dB) | 30 |
| HPBW (°) | 75 |
| Mechanical Specifications | |
| Length - in (mm) | 166.8 (4237) |
| Upper Section Length - in (mm) | 84.5 (2146) |
| Lower Section Length - in (mm) | 85.1 (2162) |
| Weight - lbs (kg) | 17.2 (7.8) |
| Element Configuration | UHF-UHF-UHF-UHF |
| Number of Elements | 4 |
| Connector Type | N-Type (Female) |
| Number of Connectors | 4 |
| Environmental & Structural Specifications | |
| Operating Temperature - °F (°C) | -40 to 158 (-40 to 70) |
| Mounting Specifications | |
| Mount Type | Mount A - Clamp Mount |
| Mast OD - in (mm) | 3 (76) |
Model Variants
- D2221 Dipole Antenna – Standard Model (225-400 MHz) with standard mounting
- D2221-M2G Shipboard Antenna – Shipboard Model with Military Double Mast Clamp (225-400 MHz)
