Druckschrift 99811574, Professional Broadcast Antennas - Kathrein
Druckschrift 99811574, Professional Broadcast Antennas - Kathrein
Druckschrift 99811574, Professional Broadcast Antennas - Kathrein
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VHF Transmitting Antenna<br />
Polarization<br />
174–230 MHz<br />
H<br />
l Antenna array of dipole panels (page 69) for different radiation patterns.<br />
l Especially suitable for mounting on square masts.<br />
l The feeder network is made up of coaxial power splitters and flexible connecting cables<br />
in accordance with the radiation patterns specification and the transmitting power.<br />
Input<br />
Connectors according to IEC, EIA or DIN.<br />
Frequency range<br />
174 – 230 MHz<br />
VSWR<br />
< 1.05 in the operating channels after tuning.<br />
Impedance<br />
50 Ω<br />
Polarization Horizontal. Application of panels K 53 33 57<br />
allows vertical polarization as well.<br />
Internal connections<br />
Connectors according to IEC, EIA or DIN<br />
are used throughout the system,<br />
allowing easy assembly and maintenance.<br />
Max. power<br />
According to customer’s requirements.<br />
Vertical radiation pattern<br />
Null fill and beam tilt upon request.<br />
Horizontal radiation pattern Omnidirectional, directional or custom-designed.<br />
Half antenna splitting Upon request, the antenna can be divided into<br />
2 halves (for measurement and maintenance).<br />
The 2 halves are connected by a<br />
2-way power splitter or patch panel.<br />
Pressurization<br />
Splitters and connecting cables can be supplied<br />
with dry air (please specify when ordering).<br />
Painting<br />
If required, the antenna is painted in aviation<br />
warning colours.<br />
Grounding<br />
Via mounting parts.<br />
Max. wind velocity<br />
225 km/h<br />
H<br />
3200 mm<br />
No. Panels Gain* Weight Antenna Windload<br />
of per (at mid-band) (without mounting height H (v = 160 km/h)<br />
bays bay dB times hardware) kg m kN<br />
2 9.0 7.9 130 2.5<br />
1 3 7.6 5.8 195 2.8 4.1<br />
4 6.1 4.1 270 5.0<br />
2 11.8 15.1 270 5.0<br />
2 3 10.4 11.0 390 6.0 8.3<br />
4 8.9 7.8 540 10.0<br />
2 14.7 29.5 540 10.0<br />
4 3 13.3 21.4 780 12.4 16.5<br />
4 11.8 15.1 1080 20.0<br />
2 16.4 43.7 810 15.0<br />
6 3 15.0 31.6 1170 18.8 24.8<br />
4 13.5 22.4 1640 30.0<br />
2 17.6 57.5 1080 20.0<br />
8 3 16.2 41.7 1640 25.2 33.0<br />
4 14.7 29.5 2160 40.0<br />
* Referred to λ/2 dipole. Attenuation of the internal cabling and the gain-decrease<br />
in case of null fill in the vertical radiation pattern are not considered.<br />
Approximate values for gain decrease:<br />
cable attenuation: 0.2 – 0.5 dB<br />
null fill:<br />
0.3 – 1.0 dB<br />
Gain figures are valid for the direction of maximum radiation (see diagrams on<br />
following page).<br />
56
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