Electromagnetic wave transmission medium comprising a flexible circular tube with a solid circle shaped ridge disposed therein
US8179213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2009 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Feb 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/103
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Provided is an electromagnetic wave transmission medium which is suited for mass production and does not affect a transmission mode. The electromagnetic wave transmission medium includes, as a main element, a flexible cylindrical tube (1) molded so that a cross-sectional shape of the cylindrical tube in a direction orthogonal to a tube axis is uniform in a direction of the tube axis. The cylindrical tube (1) includes an inner wall formed of a conductive layer having a thickness equal to or more than a skin depth. The cross-sectional shape is a circular ridge waveguide shape having a ridge (1b) which is oriented to a cylindrical axis and is symmetric with respect to a center, and the ridge (1b) has a structure to be fed with electricity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.