Method and device for extending the dynamic range in measurements c arried out with a directional coupler
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United States of America Patent
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Aug 6, 1996
Grant Date -
N/A
app pub date -
Jun 9, 1994
filing date -
Jul 1, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
For extending the dynamic range in measurements carried out with a directional coupler, such as antenna measurements, a signal is supplied to the object under analysis, such as an antenna, through a first port of the measuring directional coupler, part of the signal leaking as a leak signal through a second port of the measuring directional coupler directly towards a measuring device. The signal returning from the object under analysis is measured by the measuring device. To enable the measuring of signal levels lower than before, spurious signals, such as the leak signal, summing to the signal to be measured are eliminated by supplying a phased compensation signal through a second directional coupler to the measuring line.
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