H-084 Fixed Satcom Antenna
The H-084 Fixed SATCOM Antenna is a high-gain UHF helical antenna operating across the 240–320 MHz frequency range. It is designed to support legacy UHF Follow-On (UFO) satellite communications for fixed, mission-critical military and defense installations.
Description
The H-084 Fixed SATCOM Antenna is a rugged, high-gain UHF helical antenna engineered for mission-critical military and defense satellite communications. Operating within the 240–320 MHz UHF frequency band, it provides full coverage of the uplink and downlink frequencies used by legacy UHF Follow-On (UFO) SATCOM systems.
Featuring an 8-element helical design, the H-084 delivers 13.1 dBic gain at 320 MHz, providing reliable, high-performance ground-to-satellite connectivity. Its directional radiation pattern and right-hand circular polarization (RHCP) help improve signal focus, reduce interference, and maintain stable communications in challenging operational environments.
Designed to meet military standards, the H-084 is built to withstand extreme temperatures, high wind loads, and harsh field conditions. Its rugged, field-proven construction makes it a dependable solution for fixed installations supporting legacy UHF SATCOM networks in remote or demanding locations.
| General Specifications | |
|---|---|
| Model Name | H-084 |
| Part Number | 18755807 |
| 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) | 240-320 |
| Frequency Band | UHF |
| Gain - (dBic) | 13.1 @ 320 MHz |
| Polarization | RHCP |
| VSWR (Max) | 1.5:1 |
| Impedance (Ω) | 50 |
| Max Input Power (W) | 500 |
| Axial Ratio (dB) | 1.2 |
| Front/Back Ratio - Min. (dB) | 28 |
| HPBW (°) | 46 @ 280 MHz |
| Mechanical Specifications | |
| Length - in (mm) | 112 (2845) |
| Weight - lbs (kg) | 36 (16.3) |
| 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) | 2.5 (.23) |
| Wind Loading Area with ½" Ice - ft² (m²) | 5.6 (.52) |
| Wind Load ft-lbs | 344 |
| Wind Load ft-lbs with ½" Ice | 223 |
| Survival Rating No Ice - mph (kph) | 150 (241) |
| Mounting Specifications | |
| Mount Type | HM-5 Mount, Dual Pedestal Mount, AM-1 Mount |
Model Variants
- H-084A Fixed Satcom Antenna – Frequency-Shifted Model (225-400 MHz)
