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Langenberg
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MW antenna Langenberg, mast "Rommel"
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 Design of antenna for realization of
directional and omnidirectional pattern
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Directional pattern:
When feeding five cage ropes as one radiator and one cage rope as the second radiator with different amplitudes and phases the directional pattern as seen below can be obtained. The sixth seperately fed cage rope is actually a flat cage consisting of four ropes.
Omnidirectional pattern:
The omnidirectional pattern is obtained when only the five cage ropes are fed.
The design of the antenna had to meet the requirement that it should be possible to radiate simultaneously the frequency 1593 kHz. It had an impact on dimensioning the insulators. But this option was not realized.
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The horizontal patterns:
WDR 2 or traffic channel VERA on medium wave 720 kHz
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This pattern for protecting an Irish radion station on the same frequency during the night.
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Pattern for day coverage
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The measurement of the horizontal patterns was elaborate.
The measuring instrument of field strength on the wooden chair,
the antenna Rommel in the back.
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Langenberg
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Survey of
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