Microwave resonant cavity
US4965540A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | May 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microwave resonant cavity for a spectroscopic light source includes a housing having therein a chamber formed by side walls and a cylindrical outer wall. The side walls having aligned openings therethrough which are on the longitudinal axis of the outer wall. A refractory tube which is adapted to contain a gaseous plasma extends through the aligned openings and across the chamber in the housing. The portion of the side walls of the chamber adjacent the openings are closer together than the remaining portions of the side walls so that the chamber has a first portion around the refractory tube which is narrower than a second portion of the chamber around the first portion. A coupling loop is electrically coupled to a side wall of the chamber within the second portion of the chamber and is connector to a coaxial connector which extends through the outer wall of the housing to deliver microwave power to the chamber. This provides a resonant cavity in which the plasma formed in the refractory tube is very short for increased power and greater brightness of the plasma. This also provides a resonant cavity which requires no tuning and is more stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.