Wave transmission lines and networks – Long lines
Patent
1978-01-12
1980-08-05
Gensler, Paul L.
Wave transmission lines and networks
Long lines
333242, 333243, H01P 306, H01P 312
Patent
active
042164494
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).
REFERENCES:
patent: 2929034 (1960-03-01), Doherty
patent: 3603899 (1971-09-01), Gyorgy et al.
patent: 3668574 (1972-06-01), Barlow
patent: 3703690 (1972-11-01), Ravenscroft et al.
patent: 3845426 (1974-10-01), Barlow
BBC Brown Boveri & Company Limited
Gensler Paul L.
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