Products

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R&D-departments, where our engineers are always working
to develop new innovative products in co-operation with our customers.

S.4Y series

Directional antennas

  • The S.4Y series are of a rugged and reliable construction for communication networks at both UHF & VHF.
  • The one piece folded dipoleincorporates a d.c. short to minimise static interference.
  • The balun assembly is completely encapsulated in epoxy resin, totally preventing
    moisture ingress, and has been tested to BS5490:IP67.
  • These antennas give a gain of 7.5 dBd with front to back ratio typically 15 dB.
  • They are supplied as standard with 3 metres of RG 213 cable terminated with an 'N' type socket, although cable and connector options are available upon request.

ORDERING DESIGNATIONS

TYPE FREQUENCY PRODUCT NO.
S.4Y-73 69 - 77 MHz 123002040
S.4Y-82 77 - 87 MHz 123002041
S.4Y-127 117 - 137 MHz 123002044
S.4Y-165 155 - 175 MHz 123002045
S.4Y-184 176 - 192 MHz 123002046
S.4Y-200 192 - 208 MHz 123002047
S.4Y-405 380 - 430 MHz Replaced by 7041410
S.4Y-445 420 - 470 MHz Replaced by 7041420

SPECIFICATIONS

ELECTRICAL  
FREQUENCY RANGE 69 - 470 MHz
INPUT IMPEDANCE 50Ω
BANDWIDTH ± 6% of centre frequency
SWR <1.5:1
FRONT TO BACK RATIO 15 dB
MAXIMUM INPUT POWER 150 Watts
POLARISATION Vertical & horizontal
FORWARD GAIN 7.5 dBd
3 dB BEAMWIDTH E Plane 57º
H Plane 74º
MECHANICAL  
STANDARD CONNECTION 3 m (118.11 in.) Length of RG 213
c/w 'N' type socket
ELEMENTS UHF UHF 12.7 mm dia. x 1.6 mm
(0.50 in. dia x 0.06 in.)
wall aluminium alloy grade 6063T6
ELEMENTS VHF VHF 19.0 mm dia. x 1.6 mm
(0.75 in. dia x 0.06 in.)
wall aluminium alloy grade 6063T6
SUPPORT BOOM 31.7 mm dia. x 2.6 mm
(1.25 in. dia x 0.10 in.)
wall aluminium alloy grade 6082T6
FASTENERS Stainless steel grade A2-70
SADDLE CLAMPS Diecast zinc alloy
INSULATOR Epoxy resin encapsulant
LIGHTNING PROTECTION Direct grounded
MOUNTING BRACKETS See mounting accessories (not supplied)
TYPICAL WEIGHT (UHF) UHF 2.3 kg (5.07 lb.)
TYPICAL WEIGHT (VHF) VHF 6.0 kg (13.23 lb.)
TYPICAL LENGTH (UHF) UHF 0.9 m (35.43 in.)
TYPICAL LENGTH (VHF) VHF 3 m (118.11 in.)
TYPICAL WIND LOADING
@ 162 km/h (UHF)
UHF 60 N
TYPICAL WIND LOADING
@ 162 km/h (VHF)
VHF 340 N

MOUNTING ACCESSORIES

Mounting accessories to be ordered separately.

TYPE DIMENSION PRODUCT NO.
1763-100   123001001
UA64-23 25 - 50 mm 123001006
UA64-23 25 - 76 mm 123001007
UA66-24 25 - 50 mm 123001017
UA66-24 25 - 76 mm 123001018
UA66-24 25 - 100 mm 123001019
UA66-24 25 - 115 mm 123001020

 

1763-100

Galvanised steel-cross-over clamp, fits 32 mm (1-1/4") diameter antenna booms to up to 50 mm (2") diameter poles, max. length 1500 mm.

 

UA64-23

Circular cast alloy clamp, gives a good two point fixing, supplied as standard with 4 x 50 mm stainless steel ‘U’ bolts and two half-moon cast spacers to fit antenna booms of 25 to 50 mm diameter. Will also accomodate 76 mm (3”) ‘U’ bolts to fit masts of that diameter. (order UB06).

 

 UA66-24

Rectangular cast alloy clamp, gives a good two point fixing, supplied as standard with 4 x 50 mm stainless steel ‘U’ bolts and two half-moon cast spacers to fit antenna booms of 25 to 50 mm diameter. To fit 76 mm (3”) masts (order UB06 ‘U’ bolts). To fit 100 mm (4”) masts (order UB07 ‘U’ bolts). To fit 115 mm (4 1/2”) masts (order UB09 ‘U’ bolts).

TYPICAL RADIATION PATTERN (E-PLANE)


 

If the antennas are mounted for vertical polarization, these curves show the radiation patterns in the vertical plane.

 

TYPICAL RADIATION PATTERN (H-PLANE)


 

If the antennas are mounted for vertical polarization, these curves show the radiation patterns in the horizontal plane (horizontal coverage).

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