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S.M4-8-165

Dipole ArraysS.M4-8-165

4-stacked eight-dipole phased array 155 - 175 MHz

Description

  • The S.M4-8 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.

Specifications

Electrical
Model S.M4-8-165
Frequency 155 - 175 MHz
Max. Input Power 500 W
Polarisation Vertical
3 dB Beamwidth, E-Plane 21 °
3 dB Beamwidth, H-Plane Elliptical omni
Impedance 50 Ω
Gain 8.7 dBd (10.9 dBi)
VSWR < 1.5:1
Antistatic Protection All metal parts DC-grounded (Connector shows a DC-short)
Mechanical
Elements 12.7 x 1.6 mm dia. / 0.5 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. 6000 mm / 236.22 in.
Element Clamps Diecast Al / Zinc alloy
Wind Load 822 N (160 km/h)
Weight Approx. 32 kg / 70.55 lb.
Balun Encapsulant Polyurethane Resin U-600
Environmental
Ingress Protection IP68

Diagram and Mounting

RADIATION PATTERNS

E-Plane | 165 MHz E-Plane | 165 MHz

RADIATION PATTERNS

H-Plane | 165 MHz H-Plane | 165 MHz

Ordering Designations

Model Product No. Frequency
4-stacked eight-dipole phased array S.M4-8-165 155 - 175 MHz

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