H-084A Fixed Satcom Antenna
The H-084A Fixed SATCOM Antenna is a high-performance UHF helical antenna operating across the 225–400 MHz frequency range. It is designed to support both legacy UHF Follow-On (UFO) and next-generation Mobile User Objective System (MUOS) satellite communications, making it an ideal solution for fixed installations requiring interoperability across evolving UHF SATCOM networks.
Description
The H-084A Fixed SATCOM Antenna is engineered for dependable, mission-critical UHF satellite communications in fixed ground installations. Operating across the 225–400 MHz UHF frequency band, it provides wideband coverage supporting legacy UHF Follow-On (UFO) SATCOM systems as well as the next-generation Mobile User Objective System (MUOS).
Its frequency range encompasses the full uplink and downlink bands used by both UFO and MUOS networks, enabling dual-system compatibility for transition-phase and mixed-fleet operations. Designed for permanent deployments, the H-084A integrates seamlessly into fixed ground stations supporting military and government UHF SATCOM requirements.
A rugged, field-proven construction helps maintain reliable link performance in harsh operational environments, while the compact helical form factor simplifies site planning and system integration. The H-084A is compatible with AM-1 mast and HM-5 tripod mounts and remains a proven choice for military and government SATCOM networks worldwide.
| General Specifications | |
|---|---|
| Model Name | H-084A |
| Part Number | 18755804 |
| Antenna Type | Helical Antenna |
| Radiation Pattern | Directional |
| Colour | Battleship Grey, Semi Gloss finish (RAL 7046) |
| Compliances | RoHS, REACH |
| Markets | Military & Defence, Satellite Communications |
| Electrical Specifications | |
| Frequency (MHz) | 225-400 |
| Frequency Band | UHF |
| Gain - (dBic) | 13.1 @ 370 MHz |
| Polarization | RHCP |
| VSWR (Max) | 1.5:1 |
| Impedance (Ω) | 50 |
| Max Input Power (W) | 500 |
| Axial Ratio (dB) | 1.1 |
| Front/Back Ratio - Min. (dB) | 28 |
| HPBW (°) | 45 @ 310 MHz |
| Mechanical Specifications | |
| Length - in (mm) | 103 (2611) |
| Weight - lbs (kg) | 33 (15.0) |
| Ground Plane Diameter - in (mm) | 35 (889) |
| Connector Type | N-Type (Female) |
| Number of Connectors | 1 |
| Environmental & Structural Specifications | |
| Operating Temperature - °F (°C) | -40 to 158 (-40 to 70 ) |
| Wind Loading Area - ft² (m²) | 2.2 (.20) |
| Wind Loading Area with ½" Ice - ft² (m²) | 4.9 (.45) |
| Wind Load ft-lbs | 259 |
| Wind Load ft-lbs with ½" Ice | 169 |
| Survival Rating No Ice - mph (kph) | 150 (241) |
| Mounting Specifications | |
| Mount Type | HM-5 Mount, Dual Pedestal Mount, AM-1 Mount |
Model Variants
- H-084 Fixed Satcom Antenna – Frequency-Shifted Model (240-320 MHz)
