Stripline filter with capacitive coupling structures
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Dec 18, 1995
filing date -
Dec 22, 1994
priority date (Note) -
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Abstract
A stripline filter includes a ceramic substrate having first and second mutually opposite side surfaces and an end surface. At least one stripline resonator is disposed on the first side surface. Capacitive coupling structures are disposed at the end surface for coupling a high-frequency signal in and out. Ground metallizing covers the ceramic substrate except for the first side surface and the end surface. The coupling structures are formed by coupling metal surfaces being disposed on the second side surface and a galvanic separation being disposed on the second side surface and separating the coupling metal surfaces from the ground metallizing; metal surfaces being disposed on the first side surface and being galvanically separated from the stripline resonators; and through holes being formed in the ceramic substrate for galvanically connecting the coupling metal surfaces and the metal surfaces to one another through the through holes.
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