Deep rejection reflectionless filters
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United States of America
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Jan 7, 2020
Grant Date -
Jul 25, 2019
app pub date -
Apr 2, 2019
filing date -
Apr 2, 2019
priority date (Note) -
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Abstract
Reflectionless electronic filters, as well as a method for designing such filters is disclosed, along with a method of realizing critical subcircuits within those filters that mimic the behavior of tee- and pi-networks having negative elements, though the critical subcircuits themselves are entirely passive. This allows a much broader range of transmission responses to be realized in reflectionless form than in the prior art, and especially with lower ripple factor for deeper rejection in equal-ripple Chebyshev responses. Reflectionless filters preferably function by absorbing the stop-band portion of the spectrum rather than reflecting it back to the source, which has significant advantages in many different applications.
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