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S.M4-160-SB

Dipole ArraysS.M4-160-SB

4-stack dipole array, 145 - 175 MHz, split boom

Description

  • The S.M4 is an 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.M4-160-SB
Frequency 145 - 175 MHz
Max. Input Power 500 W
Polarisation Vertical
3 dB Beamwidth, E-Plane 16 °
3 dB Beamwidth, H-Plane 180° (offset configuration), 360° (omni configuration)
Impedance 50 Ω
Gain Omni 5.7 dBd
Offset 8.7 dBd
VSWR < 1.5:1
Front-To-Back Ratio > 7 dB offset
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 6 m (supplied in two sections)
Element Clamps Diecast Al / Zinc alloy
Wind Load 694 N (160 km/h)
Weight Approx. 26 kg / 57.32 lb.
Balun Encapsulant Polyurethane Resin U-600
Environmental
Ingress Protection IP68

Diagram and Mounting

RADIATION PATTERNS

E-Plane | 160 MHz E-Plane | 160 MHz

RADIATION PATTERNS

H-Plane | 160 MHz H-Plane | 160 MHz

Ordering Designations

Model Product No. Frequency
4-stack dipole array, split boom S.M4-160-SB 145 - 175 MHz

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