Metal post filter assembly using non-radiative dielectric waveguide
US6486753B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Oct 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a metal post filter assembly, of a millimeter wave band, using an NRD guide. A filter to which an electromagnetic wave travels is disposed in a filter housing which includes parallel conductive plates facing each other. The filter forms a plurality of inserting holes, by segmenting them into multi-stages, along the length direction of side surface of a dielectric line and parallel to the parallel conductive plates. The filter has a structure that multi-staged dielectric resonators are formed in a single body by inserting metal posts which provide discontinuous surfaces which cause a reflection with respect to the electromagnetic wave in each of the inserting holes. Each impedance of the multi-staged dielectric resonators has an impedance coupling relationship that the impedance becomes gradually and symmetrically smaller to both end stages. According to the impedance coupling relationship, a reflection amount of, and a transmission amount of, the electromagnetic wave traveling along the filter are properly determined. As a result, the filter provides a filtering function which selectively passes only a certain frequency band of the electromagnetic wave. The filter asse…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.