SD-FM DIPOLE 87
SD-FM DIPOLE 87-194 MHz
VHF Base Station Antenna
87...194 MHz
DESCRIPTION
Dipole base station antenna working on 87-194 MHz by cutting.
Optimized for vertical polarization it can be also placed in horizontal
polarization. The elements are fixed to the boom by a strong die-cast
metal support to get the maximum strength. All connections are
waterproof and it is supplied with UHF female connector. To inprove
the antenna gain please install it in stacked or bayed array.
TECHNICAL DATA
Electrical Data
Type
Dipole
Frequency range
87 - 194 MHz tunable by cutting
Impedance
50 Ω Unbalanced
Polarization
Linear Vertical or Horizontal
Bandwidth @ SWR 1.5
≥ 14.9 @ 87 MHz
SWR @ freq. res.
≤ 1.2
Max Power
1000 Watts (CW)
Feed system
Gamma Match
Connector
UHF-female with rubber protection cap
Mechanical Data
Materials
Aluminum, EPDM rubber, Zamak, Zinc plated
Steel,Chromed Brass
Wind load / resistance
99 N at 150 Km/h / 160Km/h
Wind surface
0.08 m2
Boom/elements diameter
33mm/16mm
Dimensions (approx.)
1030 x 1600 mm
Weigth (approx.)
1850 gr
Turning radius
900 mm
Operating temperature
-40° C to +80° C
Mounting Mast
∅ 35-52 mm
MOUNTING INSTRUCTIONS
Mounting Bracket
SD bracket parts list
Q.ty
Description
1
SD/SY Steel bracket
2
M8x200 U-bolt
4
M8 Hexagonal nut
4
M8 Grower washer
4
M8 Flat Washer
4
M6x125 U-bolt
8
M6 Hexagonal nut
8
M6 Grower washer
8
M6 Flat washer
Materials
Zinc Plated Steel
Weight
865g
Re-order code: SA088
HI-QUALITY ANTENNAS MADE IN ITALY
B Copyright SIRIO antenne - Technical data are subjected to change - Printed in Italy - Rev. 09/07/2010 - Cod. ID285
MOUNTING INSTRUCTIONS
Direction for tuning
ATTENTION!
Place the Gamma
Match on upper side for
vertical polarization
1) Choose your working frequency.
2) Cut both tubes A at L1 (PVC cap must not be mounted).
3) Assemble both tubes A and place element B at L2.
C
L3
4) Place element C of the gamma match at L3.
- working frequency 87...123 MHz: proceed at point 5).
- working frequency 123...194 MHz: cut element C
85mm from the side of PVC cap
B
85mm
C
5) You can proceed by mounting your antenna on the mast in
vertical or horizontal position.
- Vertical polarization: place your antenna at distance L4
from the mast to get the best performance
- Horizontal polarization: distance L4 is not required
L2
Note: It is recommended to use the above table just as a guide. For fine-tuning please use an SWR-Meter.
A
A
Mast
L1
L4
Element Mounting
A
L1
(mm)
L2
(mm)
L3
(mm)
L4
(mm)
87
93
98
103
108
113
118
123
123
130
138
146
154
162
170
178
186
194
770
726
690
664
634
615
582
550
550
510
470
438
413
390
370
350
333
315
249
242
233
226
220
214
210
205
179
171
163
156
146
136
127
119
111
102
19
30
42
51
58
65
73
81
102
113
125
135
146
157
168
177
186
196
860
810
771
742
716
689
650
610
610
576
541
508
483
460
440
420
403
385
Gamma Match
Mounting
Element
support
Hex.
socket set
screws
Freq.
(MHz)
A
See “Direction for tuning”
point 4
A
A
B
C
Cable connection
3mm Hex. key
HI-QUALITY ANTENNAS MADE IN ITALY
ID285
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