Waveguide for the transmission of electromagnetic energy
US4216449A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1978 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Jan 12, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P3/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A waveguide for the transmission of electromagnetic energy which has a low attenuation even with a small line cross-section realized by disposing in the interior of an electromagnetically shielded hollow cylinder, consisting of a substance having a low permittivity, a dielectric wire of a substance having a high permittivity. An E.sub.om -wave (m = 1, 2, 3 . . . , circular H field) is excited in the dielectric wire and the dimensioning of the dielectric wire is such, depending on the permittivities of the two substances and the particular operating frequency, that a TEM wave develops at least substantially in the space in the dielectric hollow cylinder. In the simplest case, the electromagnetic shield can consist of a metal tube and the dielectric hollow cylinder can consist primarily of air. Furthermore, the E.sub.om wave excited in the dielectric wire is preferably the E.sub.01 wave (TM.sub.01 mode).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.