S.18Y
Eighteen Element Yagi Antenna
TM
The S.18Y series offer high gain from a highly directive radiation pattern for use in UHF link systems gain together with a four element reflector giving high
protection from unwanted signals. The one piece folded dipole incorporates a d.c. short to minimise static interference. The balun assembly is completely
encapsulated in poyurethane resin, totally preventing moisture ingress, and has been tested to BS5490:IP67. These antennas give a gain of 14.7dBd with
front to back ratio typically 25dB. They are supplied as standard with 3 metres of RG213 cable terminated with an 'N' type socket, although cable and
connector options are available upon request.
Frequency range
Manufactured between 300 - 500 MHz
Typical Bandwidth
±4% of centre frequency
Input Impedance
50Ω
VSWR
<1.5:1
Front to Back Ratio
25 dB
Maximum Input Power
150 Watts
Polarisation
Vertical & horizontal
Forward Gain
14.7 dBd
3 dB Beamwidth
E Plane 24º
H Plane 32º
Standard Connection
3m Length of RG213 c/w 'N' type socket
Support Boom
31.7 mm dia. x 2.6 mm wall Al. alloy grade 6082T6
Elements
12.7mm dia. x 1.6mm wall Al. alloy 6063T6
Fasteners
Stainless steel grade A2-70
Saddle clamps
Diecast Al / Zinc alloy
Balun Encapsulant
Polyurethane Resin U-600
Lightning protection
Direct grounded
Typical Weight
7.0 kg
Typical Length
Typical Wind loading @ 45m/s
Lightning Resistant Certified
248 N
An underboom (UB3) or non-conductive support kit (MG18-KIT) is recommended when end-mounting this
antenna.
Free Space Radiation Patterns
H-Plane
3.2 m
E-Plane
Mounting Accessories
UA66-22
Cast aluminium
cross clamp 2550mm
UA66-24
Cast aluminium
cross clamp 25115mm
Ordering Codes
Stock code
S.18Y-395
S.18Y-420
S.18Y-445
Frequency
380-410MHz
410-430MHz
420-470MHz
UB3
Aluminium
Underboom
Issue 1. E&OE
This product is RoHS compliant
Skymasts Antennas Ltd., Equilibrium House, Mansion Close, Moulton Park Industrial Estate, Nor thampton, NN3 6RU, England.
Tel+44(0)1604 494132 email [email protected] web www.skymasts.com
A part of the
Procom group