Druckschrift 99810560, Combiners and Filters for FM ... - Kathrein
Druckschrift 99810560, Combiners and Filters for FM ... - Kathrein
Druckschrift 99810560, Combiners and Filters for FM ... - Kathrein
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B<strong>and</strong>-pass Filter<br />
87.5 ... 108 MHz, 5 kW<br />
B<strong>and</strong>-pass filter can be used<br />
– <strong>for</strong> improving the input selectivity of receivers <strong>and</strong><br />
amplifiers<br />
– <strong>for</strong> increasing the isolation of transmitters whose<br />
respective antennas are close together<br />
– <strong>for</strong> suppressing noise side b<strong>and</strong>s <strong>and</strong> intermodulation<br />
products<br />
– as a component in the construction of combiners<br />
Design <strong>and</strong> Construction<br />
The b<strong>and</strong>-pass filter is made of three capacitively<br />
coupled, temperature stabilised resonators. The<br />
operating frequency, the coupling between the<br />
resonators <strong>and</strong> also the input <strong>and</strong> output couplings are<br />
adjustable.<br />
Any heat produced is dissipated into the surroundings<br />
via heat sinks. The b<strong>and</strong>-pass filter is convectioncooled,<br />
so no ventilators are required.<br />
The b<strong>and</strong>-pass filter must be tuned to the operating<br />
channel. Tuning may be done at our factory or can be<br />
carried out on site.<br />
Clear tuning instructions <strong>and</strong> also any special tools<br />
necessary are part of the delivery extent.<br />
730 150 <strong>FM</strong> B<strong>and</strong>-pass filter, 5 kW<br />
Technical Data<br />
Type No. 730 150<br />
Frequency range<br />
87.5 ... 108 MHz<br />
Insertion loss (1<br />
< 0.25 ... 0.4 dB<br />
VSWR<br />
< 1.1 (at pass b<strong>and</strong>)<br />
Impedance<br />
50 Ω<br />
Input power<br />
max. 5 kW<br />
Temperature range –20 °C ... +50 °C<br />
Connectors<br />
1 5/8″ EIA-flange<br />
Material<br />
Aluminium (outer conductor)<br />
Brass, silver-plated (inner conductor)<br />
Colour<br />
RAL 7032 (grey)<br />
Weight<br />
100 kg<br />
Dimensions (l x w x h)<br />
975 mm x 285 mm x 1260 mm<br />
Packing size (l x w x h)<br />
1100 mm x 470 mm x 1450 mm<br />
(1 Insertion loss value with st<strong>and</strong>ard tuning will be approx. 0.30 dB;<br />
reference 3-dB b<strong>and</strong>width is 800 kHz.<br />
Attenuation/dB<br />
Attenuation/dB<br />
0<br />
10<br />
20<br />
30<br />
40<br />
50<br />
-5 -4 -3 -2 -1 f 0 +1 +2 +3 +4 +5<br />
Frequency/MHz<br />
0<br />
1<br />
2<br />
3<br />
4<br />
5<br />
-1.0<br />
-0.8 -0.6 -0.4 -0.2 f 0 +0.2 +0.4 +0.6 +0.8 +1.0<br />
Frequency/MHz<br />
7
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