Monolithic Filters and Frequency-Separation Devices Based on the Ceramic Resonators

The series of band-pass, band-reject, and diplexer filters, and also the frequency-separation devices with excellent features were designed on the base of coaxial dielectric resonators (CDR). The dielectric materials used for the CDRs manufactory were distinguished by low dielectric loss and adjustable temperature stability covering the wide range of dielectric constant values (from 3 to 90). The electric MW parameters of the developed devices were measured at the frequency range of 100 MHz to 5 GHZ. Some advice for improving the filters´ design and quality were adduced.