Instrument landing system glide path transmitter device
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United States of America Patent
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-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Mar 24, 1999
filing date -
May 31, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A glide path transmitter for an instrument landing system. The transmitter includes several antenna radiators by way of which high frequency signals containing various low frequency modulated carrier and side band components are radiated. The components overlap each other in the far field where they form a guide signal which can be evaluated by aircraft. Phases of the carrier oscillations of the radiated high frequency signals form the guide signal having a set relationship with each other. A separate digitally controlled modulator is provided for each high frequency signal fed to an antenna radiator. The modulator modulates the phase and amplitude of a high frequency oscillation fed thereto according to a given model and inputs the modulated high frequency signal into the antenna radiator allocated thereto, thus reducing the supply network expenditure.
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