Dipole AntennasS.1-145

Centre fed folded dipole 135 - 155 MHz

Description

  • A VHF Center Fed Dipole antenna for PMR/Trunked Radio, Broadcast and VHF Aircraft Band applications.
  • Multiple dipoles can be mounted on a tower and connected with a phasing harness to form a high gain, stacked array.
  • Produced to the highest quality standards, these robust antenna designs will ensure reliable operation in harsh environmental conditions.
  • Former Skymasts brand product.

Specifications

Electrical
Model S.1-145
Frequency 135 - 155 MHz
Max. Input Power 150 W
Polarisation Linear (Vertical or Horizontal)
3 dB Beamwidth, E-Plane 80 °
3 dB Beamwidth, H-Plane Omni - will depend on mounting distance from mast.
Impedance 50 Ω
Gain 0 dBd (omni - will depend on mounting distance from mast)
VSWR < 1.5:1
Antistatic Protection All metal parts DC-grounded (Connector shows a DC-short)
Mechanical
Connection(s) N(f) on 3m RG213/U cable
Materials Boom, 32 mm dia. aluminium
elements, 12.7 mm dia. aluminium
balun, fully moulded enclosure
Dimensions 1330 x 915 x 95mm (L x H x D)
Wind Load 116 N (160 km/h)
Weight Approx. 2.9 kg / 6.39 lb.
Mounting Bracket 3202078/68 + 3201079/00
(Ordered Separately)
Balun Encapsulant Polyurethane Resin U-600
Alternate Mounting Bracket 0900912/00, 0302032/68, or 0300064/00 + U-Bolts to match mounting pipe diameter
(Ordered Separately)
Environmental
Ingress Protection IP68

Diagram and Mounting

RADIATION PATTERNS

E-Plane | 145 MHz E-Plane | 145 MHz

RADIATION PATTERNS

H-Plane | 145 MHz H-Plane | 145 MHz

Ordering Designations

Model Product No. Frequency
Centre fed folded dipole S.1-145 135 - 155 MHz
Accessories
Galvanised steel crossover bracket 32/50 mm 0900912/00
Pressed steel cross clamp 2" x 1-1/4" (JBL73) 0302032/68
Cast aluminium cross clamp, circular 0300064/00
M8 x 50 mm (2") U-Bolts (1 Pair) 4884036/00
M8 x 75 mm (3") U-Bolts (1 Pair) 4884076/00
Fixed norstel / coupler clamp (cross clamp) 3202078/68
Increasing sleeve 3201079/00