Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2006-04-18
2006-04-18
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S209000
Reexamination Certificate
active
07030719
ABSTRACT:
A method of tuning the frequency response of filters embedded in or formed on a ceramic substrate, such as but not limited to a low temperature co-fired ceramic substrate (LTCC), by re-firing a previously fired LTCC substrate to a temperature which is greater by a predetermined, relatively small, amount than that of the temperature produced during the original firing profile of the substrate so as to change the dielectric constant of the substrate, and thus cause a desired shift in the filter's frequency response.
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Berry Cynthia W.
Hageman Michael A.
Ham Seungsook
Northrop Grumman Corporation
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