S.M2

S.M2
Two element stacked dipole array
The S.M2 are an array of two centre fed folded dipoles mounted on an aluminium mast.
Each folded dipole balun assembly and associated harness junction is completely encapsulated in epoxy resin, totally preventing moisture ingress.
The balun assembly has been tested to BS5490:IP67.
DESCRIPTION
ORDERING DESIGNATIONS
SPECIFICATIONS
MOUNTING ACCESSORIES
RADIATION PATTERN
SPECIFICATIONS
TYPEPRODUCT NO.
UA66-22 123001005
2140.01.00.00 123001012
2141.01.00.00 123001013
ELECTRIAL
FREQUENCY RANGE 117 - 470 MHz
INPUT IMPEDANCE 50Ω
BANDWIDTH ± 4% of centre frequency
SWR <1.5:1
FRONT TO BACK RATIO 5.5 dB
MAXIMUM INPUT POWER 250 W
POLARISATION Vertical
FORWARD GAIN 5 dBd
3 dB BEAMWIDTH E Plane 36º
H Plane 180º
MECHANICAL
STANDARD CONNECTION 3 m (118.11 in.) Length of RG 213
c/w \'N\' type socket
ELEMENTS 12.7 mm dia. x 1.6 mm wall
aluminium alloy grade 6063T6
SUPPORT BOOM UHF UHF 38.1 mm dia. x 3.2 mm wall
aluminium alloy grade 6082T6
SUPPORT BOOM VHF VHF 63.5 mm dia. x 6.3 mm wall
aluminium alloy grade 6082T6
FASTENERS Stainless steel grade A2-70
DIPOLE CLAMPS Cast aluminium alloy
DIPOLE ADJUSTMENT M8 stainless steel screws
SADDLE CLAMPS Diecast zinc alloy
INSULATOR Epoxy resin encapsulant
LIGHTNING PROTECTION Direct grounded VHF lightning finial
MOUNTING BRACKETS UHF UHF fit inside scaffold pole
MOUNTING BRACKETS VHF VHF to suit structure
TYPICAL WEIGHT (UHF) UHF 4 kg / 8.82 lb.
TYPICAL WEIGHT (VHF) VHF 9 kg / 19.84 lb.
TYPICAL LENGTH (UHF) UHF 1.25 m / 49.21 in.
TYPICAL LENGTH (VHF) VHF 4 m / 157.48 in.
TYPICAL WIND LOADING
@ 162 km/h (UHF) UHF 85N
TYPICAL WIND LOADING
@ 162 km/h (VHF) VHF 292N
SURVIVAL WIND SPEED 350 km/h (97 m/s)