The Hi-Tec Range of VHF yagis and folded dipoles spans a Commercial and Professional series.
VHF folded dipoles can also be provided in multiple Stacked arrays.
|Bands available||Frequency range|
|A Band||80-88 MHz|
|FM Broadcast||88-108 MHz|
|Aviation Band||115-136 MHz|
|ESB Band||138-144 MHz|
|E Band||150-156 MHz|
|VHF Marine Band||156-162 MHz|
|EE Band||162-174 MHz|
|Spot frequencies on request.|
VHF FOLDED DIPOLES & YAGIS – COMMERCIAL SERIES
The Hi-Tec Commercial Range of VHF yagis and folded dipoles are designed for urban site installations. Being lightweight with a small projected surface area, they can be installed on low cost supports. The coding “FD” indicates a folded dipole and “Y” indicates a yagi.
Commercial series antennas are constructed from Grade 6000 series aluminium and corrosion resistance is increased by a silver anodised finish. Elements are 12mm x 1.4mm extruded sections, which provides a robust antenna.
The boom section is 25mm x 25mm x 1.7mm square tube, to which the elements are clamped. This system allows the aerial to be shipped knocked down as a kitset. Cast aluminium clamps with stainless steel hardware are used to mount each element to the boom.
Models CFD & CY Series.
VHF FOLDED DIPOLES – PROFESSIONAL SERIES
This range of folded dipoles provides broadband unity gain and is designed for general purpose base station and repeater sites. All models have vertically polarised radiation patterns which can be offset by locating the dipole at specific distances from a metallic support structure or by using a reflector.
Models FDA-SM & FDE-SM.
The folded dipole models are constructed from heavy duty extruded aluminium tube with a rugged cast aluminium centre clamp. The clamp is attached to the boom with 3 radial bolts to provide a reliable connection. All hardware is stainless steel and to increase the corrosion resistance the aluminium element and boom are silver anodised.
VHF YAGIS – PROFESSIONAL SERIES
This comprehensive range of Professional Series Yagi antennas are designed for directional point-to-point applications in the VHF bands. They are designed to be used in the most rugged environments and to withstand harsh weather conditions. They can be used for either vertical or horizontal polarisation. Please specify polarisation when ordering.
The yagis are constructed from extruded Series 6000 silver anodised aluminium with the clamps being cast aluminium and fitted with stainless steel hardware.
All elements are DC grounded.
Models Y2A to Y6A & Y2E to Y6E.
VHF FOLDED DIPOLE STACKED ARRAY
The VHF Stacked Array is designed to be used in different configurations, with minimal hardware. These arrays use our Professional Series Folded Dipoles in a stacked configuration to provide added gain.
The folded dipole assembly is mounted to a cast aluminium hub. The centre feed is taken out through the hub and a RG213 coax tail is fed down the centre of the boom and terminated with an N plug connector. The antenna is DC grounded.
FDA3-SA & FDE3-SA
2x Dipoles, 1 x Power Divider (PD-2)
FDA6-SA & FDE6-SA
4x Dipoles, 1 x Power Divider (PD-4)
FDA9-SA & FDE9-SA
8 x Dipoles, 2 x PD-4, 1 x PD-2
Mounting of the boom to a vertical 48mm OD tube can be achieved with a Cross Clamp (CLCR). This allows the dipoles to be spaced from the mounting tube to provide an omnidirectional or offset radiation pattern. The offset pattern provides a further 3 dB gain in the offset direction. This is shown in the radiation pattern on page 18 with “A” being the 1/4 wave offset and “B” the omnidirectional radiation pattern.