Ceramic filter having reduced insertion losses

摘要

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.