Druckschrift 99811574, Professional Broadcast Antennas - Kathrein

FM Transmitting Antenna
Polarization
87.5–108 MHz
H
l Self-supporting hot-dip galvanized steel superturnstile antenna. Up to 4 bays may be stacked.
l Optionally up to 8 bays may be stacked if the superturnstile antennas are mounted inside a
self-supporting fiberglass cylinder.
Input
Max. power
Frequency
VSWR
Impedance
Polarization
Vertical radiation pattern
Horizontal radiation pattern
Half antenna splitting
Internal connections
Structure
Mounting
Ice protection
Grounding
Max. wind velocity
Connectors according to IEC, EIA or DIN.
According to customer’s requirements,
10 kW max. per bay.
87.5 – 108 MHz
s < 1.2 throughout the whole frequency range.
Tuning not required.
50 Ω
Horizontal
Null fill and beam tilt upon request.
Omnidirectional
Upon request, the antenna can be divided into
2 halves (for measurement and maintenance).
The 2 halves are connected by a
2-way power splitter or patch panel.
The radiating elements are fed with
coaxial connecting cables and hybrid couplers.
Connectors according to IEC, EIA or DIN
are used throughout the system,
allowing easy assembly and maintenance.
Superturnstile antenna on self-supporting
hot dip galvanized steel structure.
Up to 4 bays may be stacked.
On top of existing structure by means of a flange.
Under icing the fiberglass cover over
the feedslots and the rugged construction keep
the antenna in proper function.
Via mounting parts.
160 km/h
H
3000 mm
No. Gain* Weight Antenna Windload
of (at mid-band) (without cylinder) height H (without cylinder)
bays dBd times kg m (160 km/h) kN
1 1 1.26 275 3 3.2
2 4 2.51 550 6 6.5
4 7 5.00 1450 12 14.0
* Attenuation of the internal cabling and the gain-decrease in case of null fill in the
vertical radiation pattern are not considered.
Approximate values for gain decrease:
cable attenuation: 0.2 – 0.4 dB
null fill:
0.3 – 1.0 dB
Gain figures are valid for the direction of maximum radiation (see diagrams on
following page).
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