VHF Shrouded Dipole
VHF Shrouded Dipole Antenna
The PRO-SHDV shrouded dipole is a rugged VHF antenna designed for harsh, exposed, and marine environments. Its dipole element is enclosed in a pultruded fibreglass radome with black heat shrink sheathing to reduce surface area and assist with ice shedding.
Built for reliable long-term performance, the antenna features a DC grounded dipole element to help reduce precipitation static, a heavy-duty element-to-boom casting, and a 48mm OD grade 6000 aluminium boom. The centre feed exits through the casting, with an RG213 coax tail routed down the centre of the boom.
The vertical radiation pattern can be offset by positioning the dipole at specific distances from a metallic support structure or by using a reflector. Cross clamps are recommended for mounting to a rigging pipe support.
Model PRO-SHDV
The shrouded dipole provides a rugged mechanical design with a reduced surface area, making it ideal for a harsh or marine environment. To achieve this, the dipole element is shrouded in a ‘pultruded’ fibreglass radome which is sheathed with black heat shrink to assist ice shedding.
The dipole element is DC grounded which assists reduction of precipitation static. The centre feed exits through the heavy duty, element to boom casting. This casting is then attached to the boom with three radial bolts to provide reliable fixing. All booms for the VHF shrouded dipoles use 48mm OD x 4.5mm grade 6000 aluminium tubing. A coax tail of RG213 is fed down the centre of the boom.
All models have a vertical radiation pattern which can be offset by locating the dipole at specific distances from a metallic support structure or by using a reflector.
Suitable clamps to use are the cross clamps to a rigging pipe support.
| Model | PRO-SHDV | |
| Frequency Range (MHz) | 75-80 bandwidth | 118-170 (see bandwidth) |
| Bandwidth (MHz) | 8 | 20 |
| Input Impedance (Ohms) | 50 | |
| Return Loss (dB & VSWR) | <-14dB 1.5:1 | |
| Maximum Power (W) | 100 | |
| Cable Type | RG213 | |
| Radome Length (m) | 1.8 | 1 |
| Radome Diameter (mm) | 40 | |
| Boom Length (m) | 1.5 | 1 |
| Boom Diameter (mm) | 48 | |
| Projected Area (m2) | 0.15 | 0.09 |
| Wind Loading at 150 km/h (N) | 165 | 100 |
| Weight (kg) | 4.9 | 3.7 |
