In-line pseudoelliptic TE01(nδ) mode dielectric resonator filters
US9190701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Dec 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention uses TE01(nδ) single-mode resonators in different orientations that are cascaded along an evanescent mode waveguide. By exploiting multiple orthogonal evanescent modes that can alternatively by-pass, or excite the resonators, cross-coupling between non-adjacent resonators is established and properly controlled. Pseudoelliptic filters are realized without using cumbersome cross-coupled architectures, or reduced spurious performance multi-mode resonators. A 6th order filter with two transmission zeros in the lower stopband, a 5th order filter with three transmission zeros, and an 8th order filter with four transmission zeros are included as embodiments of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.