DEVICES AND METHODS RELATED TO MULTIPLE-POLE CERAMIC RESONATOR FILTERS

摘要

Devices and methods related to multiple-pole ceramic resonator filters. In some embodiments, a radio-frequency (RF) filter can include a first coaxial resonator in a first orientation and having an input tab on a first side of the filter, and an N-th coaxial resonator in the first orientation and having an output tab on the first side of the filter. The RF filter can further include second and (N−1)th coaxial resonators, each in a second orientation opposite the first orientation to form first and second interdigitations with the first and N-th resonators, respectively. The RF filter can further include at least two coaxial resonators in the first orientation and coupled between the second and (N−1)th resonators. The N resonators can be slot coupled between the first and N-th resonators. The first and second interdigitations can be configured to provide enhancement of the slot coupling between the first and N-th resonators.

主权项

1. A radio-frequency (RF) filter, comprising:
a first coaxial resonator in a first orientation and having an input tab on a first side of the filter; an N-th coaxial resonator in the first orientation and having an output tab on the first side of the filter; a second coaxial resonator in a second orientation opposite the first orientation so as to form a first interdigitation with the first resonator; an (N−1)th coaxial resonator in the second orientation so as to form a second interdigitation with the N-th resonator; at least two coaxial resonators in the first orientation and coupled between the second and (N−1)th resonators; the N resonators configured to provide slot coupling between the first and the N-th resonators, the first and second interdigitations configured to provide enhancement of the slot coupling between the first and N-th resonators.