Transmission line of unsintered PTFE having sintered high density portions
US4525693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Apr 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P3/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission line is provided, at least a portion of the wave energy transmitting part of the line being made of a dielectric material shaped to create a physical condition which preserves the deflected wave surface of the electromagnetic wave along the portion of the transmission line. The physical condition for preserving the deflected wave surface is formed by providing at least one linear portion which retards the speed of energy transmission so as to prevent the rotation of the electric field surface of the electromagnetic wave. The wave energy transmitting portion composed of dielectric material is preferably made to have an oval cross-section in which the ratio between the major axis and the minor axis has a value not lower than 4/3. Alternatively, the wave energy transmitting portion can be made to have a rectangular cross-section. The objects of the invention can also be attained by increasing the density of a portion of the line along its length or by applying a local stress over the entire length of the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.