Coaxial filter having first to fifth resonators, where the fourth resonator is an elongated resonator
US10116026B2 · kind B2 · utility
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4References
12Claims
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Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Oct 21, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/207
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave filter has a housing defining an inner cavity. A first resonator is positioned in a first portion of the inner cavity. A second resonator is positioned in a second portion of the inner cavity. A third resonator is positioned in a third portion of the inner cavity. The first resonator and the third resonator are cross-coupled via an iris. The second resonator is elongated and is coupled to the first resonator and the third resonator. The resulting microwave filter has a frequency response having a transmission zero in the lower stopband. A high-pass filter is realized without the use of a cross-coupling probe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.