Ceramic filter having reduced insertion losses

Details Ceramic filter having reduced insertion losses Ceramic filter having reduced insertion losses

1997-06-09

1999-10-05

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333219, H01P 1203

Patent

active

059631155

ABSTRACT:
The Application describes a ceramic filter as well as a method of manufacturing same. Such filters comprise at least two stripline resonators in the form of printed metal layers which, during operation of the filter, are electromagnetically coupled and which are separated from each other by means of a ceramic dielectric. In accordance with the invention, the metal layers (preferably of palladium) must have a minimum thickness of 10 micrometers, and they are substantially rectangular in cross-section. Filters having these characteristics exhibit surprisingly low insertion losses during operation. The invention can very advantageously be used in so-called broadline-coupling filters.

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patent: 5349314 (1994-09-01), Shimizu et al.
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patent: 5497130 (1996-03-01), Hirai et al.
patent: 5621366 (1997-04-01), Gu et al.
patent: 5691676 (1997-11-01), Snel et al.

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