FM Broadcast Antenna
[Model # SCFM Frequency Range 87.5-108 MHz]
GENERAL:
 The SCFM series FM Broadcast Antennas offer classical choice of
antenna configuration with circular polarization.
These are very widespread, allows the irradiation of mono and stereo
signals, particularly in hard zones such as conurbations and mountains.
DESIGN & CONSTRUCTION:
The SCFM series FM Broadcasting Antennas have low VSWR and high gain covering the complete
FM broadcast band from 87.5 MHz. to 108 MHz. These antennas are mounted on the side of a
square/triangular lattice antenna-tower for uniform Omni directional coverage.
Center fed power divider ensures equal and in-phase power distribution to each bay in a
multi bay system. The air-cored power divider is made of marine quality high grade brass
tubes, while the center conductor of the air-cored power divider is made of beryllium
copper which is silver-plated. All insulators and separators are made of virgin TEFLON.
The SCFM series FM Broadcast Antennas operate at D.C. ground for protection against
lightening and immunity to noise. The dipole arms are mounted on a tubular boom made of
high strength aluminum alloy, which offers a low resistance discharge path in the event of
lightning.
The SCFM series FM Broadcast Antennas are supplied with dismantled dipole arms for easy
handling and transportation and are assembled at site with simple hand tools.
RADIATION PATTERN:
With Bipolar structure and absence of parasitic elements, SCFM series FM Broadcast
Antennas guarantee a uniform radiation pattern over 360 degrees in horizontal plane,
practically circular polarization with a variation of less than +/- 2 dB.
Electrical Data [FM Broadcast Antenna]
| Model |
SCFM |
| Frequency Range - MHz. |
87.5-108 |
| Bandwidth (MHz.) |
20 |
| Impedance (Ohms). |
50 |
| VSWR (Better Than ) |
1 : 1.3 |
| Vertical Beamwidth
(half power points) - Degrees |
36 |
| RF power handling capacity -
Watts. |
200 |
| Polarization. |
Circular |
| Termination. |
N-female or 7/8" Female |
| Lightning Protection |
Direct ground |
SCFM Multi-Bay Array System
| Number of Bays |
Gain (dBi) |
Powern Rating
N Type
(Each Bay) |
Powern Rating
7/8" Type
(Each Bay) |
Reg. Verticle Space
Feet (Meters) |
Model Number |
| 1. |
-2.25 |
0.8 kW |
2.0 kW |
20 (6.1) |
SCFM-1 |
| 2. |
0.65 |
1.5 kW |
3.5 kW |
30 (9.1) |
SCFM-2 |
| 3. |
2.15 |
2.0 kW |
5.0 kW |
40 (12.2) |
SCFM-3 |
| 4. |
3.30 |
2.5 kW |
7.0 kW |
50 (15.2) |
SCFM-4 |
| 5. |
3.75 |
3.0 kW |
8.5 kW |
60 (18.3) |
SCFM-5 |
| 6. |
5.00 |
3.5 kW |
10.0 kW |
70 (31.3) |
SCFM-6 |
Mechanical Data [FM Broadcast Antenna]
| Model |
SCFM |
| Support pipe -
material. |
Aluminum |
| Support pipe O.D. - Inches. |
1.5 (38mm) |
| Radiating Elements -
material. |
Aluminum |
| Radiating Elements - O.D. -
Inches. |
3/4 (19mm) |
| Dipoles arms mounting clamp. |
Aluminum |
| Mounting Hardware. |
Stainless Steel |
| Mount Pipe Diameter- inches |
1 - 4 ( 25 - 100 mm) |
| Approximate Dimension Per
Bay- Inches. |
63x50x50 (1600x1270x1270 mm) |
| Typical Shipping Size
per Bay - Inches. |
66x12x12 (1700x300x300 mm) |
| Center to center distance (
in multi bay array) - Inches |
102 ( 2600 mm) |
| Weight with mounting clamps
(Each Bay) - Kgs. |
8 |
| Wind Rating - Km/hr. |
200 |
• Gain, Overall length and
weight are shown at center frequency of each band.
• When ordering, please specify the exact
frequency band of operation. |
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