414.04 - TETRA Four Stack Dipole Array

The 414.04 Antenna is a version of the S.M4 four-stack dipole array, designed for improved performance in multi-channel communication systems such as TETRA. The antenna features four phased folded dipoles fed with an RG214 coaxial feed network which allows for beamtilt to be applied to the pattern; high quality materials and manufacturing techniques are employed throughout to ensure that the antenna meets strict intermodulation requirements of multi-channel systems. The balun housings and cable connections are completely encapsulated in an epoxy compound to IP67 eliminating any risk from water ingress. The antenna is supplied as standard with a 5 metre tail terminated with a 7/16 socket.

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Frequency Range 380-430 MHz Input Impedance 50Ω VSWR <1.5:1 Front to Back Ratio 7 dB Maximum Input Power 200W CW Polarisation Vertical Forward Gain 8.7 dBd (10.85dBi) 3dB Beamwidth E Plane 21º H Plane 180º Available beamtilts Any specified tilt available up to 15º Intermodulation -143dBc (3rd order), 2 x Tx@43dBm Standard Connection 5m Length of RG214 c/w 7/16 DIN socket Dipoles Feeds RG214 Coaxial cable Elements 12.7mm dia. x 1.6mm wall aluminium alloy grade 6063T6 Support Boom 12.7mm dia. x 1.6mm wall aluminium alloy grade 6063T6 Fasteners Stainless steel grade A2-70 Diplo Clamps Cast aluminium alloy Sadlle Clamps Diecast zinc alloy Insulator Epoxy resin encapsulant Lightning Protection Direct grounded Mounting Brackets To fit inside scaffold pole Typical Weight 6.2 kg Typical Length 2.6 m Maximum Wind Loading @ 45m/s 191N Survival wind speed >250km/h