Adaptive method used to overcome channel to channel isolation
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United States of America Patent
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Dec 4, 2007
Grant Date -
N/A
app pub date -
May 18, 2006
filing date -
May 18, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Selectable attenuators are used in the reference and test paths of a VNA, with attenuation automatically inserted or deleted when the Device Under Test (DUT) attenuation reaches predetermined thresholds. Attenuation in the reference channel is removed when the signal in the test channel is sufficient to overcome the leakage of the reference channel. Additionally, attenuation is removed from the test channel when the reference channel has a high attenuation inserted to further increase the difference between the leakage reference signal and the reduced test channel signal thus allowing lower isolation requirements on the two (or more) receiving channels.
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