3dB directional coupler
US4754241A · kind A · utility
Inventor
Key dates
| Filing date | May 14, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | May 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/187
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A 3dB directional coupler includes a housing accommodating two spaced apart coupling lines connecting the inner conductors of coaxial lines and coupled to each other via a coupling aperture in a partition wall which extends in said housing. The housing is thus divided into two housing parts whose cross section is defined by a long side and a short side the difference of which substantially corresponds to the width of each coupling line while the cross sectional circumference of each coupling line corresponds essentially to the circumference of the inner conductors. Outside the coupling path, the coupling lines are provided with homogenous sections of sufficient length to reduce field inhomogeneities before the coupling path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.