A coaxial resonator according to an embodiment of the invention includes a tubular dielectric block, an inner conductor having a thin-film, multi-layer electrode structure, which is formed on an outer surface of a cylindrical shaft received in the hole of the tubular dielectric block, and an outer conductor...http://www.google.de/patents/US6894587?utm_source=gb-gplus-sharePatent US6894587 - Coaxial resonator, filter, duplexer, and communication device
