RHA68 directional antenna 68-78 MHz 4 dBi 50 Ω UHF-female
Sirio
Sirio SD 68 is a high-quality directional dipole antenna designed for the 68–78 MHz VHF Low Band. It is an excellent choice for RHA68 village radio systems, public-safety communications, industrial sites and other fixed VHF Low Band installations that require reliable performance and reduced interference.
The directional design concentrates the signal in the desired direction, improving connection quality and reducing interference. The Gamma Match feed provides good matching across the operating range without separate tuning. The antenna can be installed for vertical or horizontal polarisation, and its durable aluminium construction and weather-resistant materials ensure a long service life even in demanding outdoor conditions. All metal parts are DC-grounded to help protect the system against static electricity.
Features
- Directional dipole antenna for the 68–78 MHz frequency range
- Excellent choice for RHA68 village radio systems
- Gain: 4 dBi (1.85 dBd) with vertical polarisation
- Vertical or horizontal polarisation
- Gamma Match feed
- 50 ohm impedance
- UHF female (SO-239) connector
- Maximum transmit power: 350 W
- No tuning required within the operating range
- All metal parts are DC-grounded
- Suitable for stacked or bayed antenna arrays
- Durable aluminium construction for outdoor use
Suitable applications include
- RHA68 village radio networks
- Village and regional communications
- Rescue and public-safety communications
- Industrial and production facilities
- Ports
- Agriculture and forestry
- Fixed VHF Low Band base stations
- Professional radio communication systems
Sirio SD 68 provides a reliable, long-lasting solution for RHA68 and other VHF Low Band systems. Its high-quality materials, dependable performance and easy installation make it an excellent choice for demanding professional applications.
SKU :
SD-68Technical specifications
Property / Value
Model: Sirio SD 68
Part number: 2108801/68
Antenna type: directional 1/2-wave antenna
Applications: RHA68, VHF Low Band
Frequency range: 68–78 MHz
Gain: 4 dBi (1.85 dBd)
Polarisation: vertical or horizontal
Beamwidth (H): 240° at 73 MHz
Beamwidth (E): 80° at 73 MHz
Front-to-back ratio: ≥ 4 dB
SWR: ≤ 1.5
Impedance: 50 Ω
Feed system: Gamma Match
Maximum transmit power: 350 W (CW)
Connector: UHF female (SO-239)
Grounding: all metal parts DC-grounded, centre conductor capacitively coupled
Mounting: mast Ø 35–52 mm
Dimensions: 1915 × 1065 mm
Wind surface area: 0.087 m²
Wind load: 113 N at 150 km/h
Operating temperature: −40 to +80 °C
Weight: 2.02 kg
Materials: aluminium, galvanised steel, chrome-plated brass, Zamak, EPDM rubber
Country of manufacture: Italy
Package contents
Sirio SD 68 RHA68 antenna
Mast mounting kit
Installation instructions
| General | |
|---|---|
| Brand | Sirio |
| Tekniset tiedot | |
| Supported Connectivity (Technology) | VHF, RHA68 |
| Antenna Features | Single-function antenna, SiSo, Directional |
| Mounting Location | Outdoor, Mast |
| Frequency | 66-78 |
| Connector 1 | UHF- |
| Polarity | Female |