S.M2-4-165

2-stacked four-dipole phased array 155 – 175 MHz

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S.M2-4-165
Electrical
Model S.M2-4-165
Frequency 155 – 175 MHz
Max. Input Power 500 W
3 dB Beamwidth, H-Plane Elliptical omni
Polarisation Vertical
3 dB Beamwidth, E-Plane 36 °
Impedance 50 Ω
Gain 6 dBd (8.2 dBi)
VSWR < 1.5:1
Antistatic Protection All metal parts DC-grounded (Connector shows a DC-short)
Environmental
Ingress Protection IP68
Mechanical
Elements 19.1 x 1.6 mm dia. / 0.75 x 0.06 in.
wall aluminium alloy grade 6063T6
Connection(s) N(f) on RG213/U cable
Boom Material 63.5 x 6.3 mm dia. / 2.5 x 0.25 in.
wall aluminium alloy grade 6082T6
Fasteners Stainless steel grade A2-70
Length Approx. 4000 mm / 157.4 in.
Element Clamps Cast aluminium alloy
Historic Brand Skymasts
Wind Load 419 N (160 km/h)
Weight Approx. 13 kg / 28.66 lb.
Balun Encapsulant Polyurethane Resin U-600
  • The S.M2-4 is an ‘elliptical omni’ array of phased centre fed folded dipoles mounted on an aluminium mast for PMR / Trunked radio applications.
  • Each folded dipole balun assembly and associated harness junction is completely encapsulated in poyurethane resin, totally preventing moisture ingress.
  • At VHF the antenna disassembles and flat packs for ease of shipping.
  • Former Skymasts brand product.

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2-stacked four-dipole phased array 155 – 175 MHz S.M2-4-165

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Radiation Patterns E-Plane | 165 MHz

Radiation Patterns H-Plane | 165 MHz

S M4 8 165 Hplane 165