Models PRO-FDVL-SA3, PRO-FDVL-SA6 & PRO-FDVH-SA3,
PRO-FDVH-SA6
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. The antenna is DC grounded.
Mounting of the boom to a vertical 48mm OD tube can be achieved with a Cross Clamp. 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 3dB gain in the offset direction. This is shown in the radiation pattern below with “A” being the 1/4 wave offset and “B” the omnidirectional radiation pattern.
Down tilt can be provided by inserting delay lines in the feed system.
Items supplied for a 3dB stacked array – 2 x Dipoles, 1 x Power Divider (PD2)
Items supplied for a 6dB stacked array – 4 x Dipoles, 1 x Power Divider (PD4)
