Wave transmission lines and networks – Resonators – Cavity resonator
Patent
1989-05-01
1990-10-23
LaRoche, Eugene R.
Wave transmission lines and networks
Resonators
Cavity resonator
333 13, 333 99PL, H01P 706, H01P 114
Patent
active
049655400
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.
REFERENCES:
patent: 2745072 (1956-05-01), Golstein et al.
patent: 3374393 (1968-03-01), Bramley
patent: 3493805 (1970-02-01), Bass
patent: 3602837 (1971-08-01), Goldsborough
patent: 3685911 (1972-08-01), Dahlquist et al.
patent: 3705319 (1972-12-01), Goldie et al.
patent: 4395684 (1983-07-01), Goldie et al.
patent: 4473736 (1984-09-01), Bloyet et al.
patent: 4575692 (1986-03-01), Goldie
patent: 4654504 (1987-03-01), Sullivan et al.
L. G. Matus et al., "Tuning and Matching the TM.sub.010 Cavity" Rev. Sci. Instrum. 54 (12), Dec. 1983, pp. 1667-1673.
M. R. Brown et al., "Reentrant Cavity As a Low-Power Plasma Source", Rev. Sci. Instrum. 57 (12), Dec. 1986, pp. 2957-2960.
Peter C. Uden, "Element-Selective Chromatographic Detection by Atomic Emission Spectroscopy", Chromography Forum, Nov.-Dec. 1986, pp. 17-26.
David L. Haas et al., "An Internally Tuned TM.sub.010 Microwave Resonant Cavity for Moderate Power Microwave-Inducted Plasma", vol. 37, No. 1, 1983, Applied Spectroscopy, pp. 82-85.
Technical Note, Spectrochimica Acta, vol. 31B, pp. 483-486, 1976.
Hall and Parzen, "Measurement of Resonant-Cavity Characteristics", Proceedings of the I.R.E., Dec. 1953, pp. 1769-1773.
R. D. Satzger et al., "Detection of Halogens as Positive Ions Using A He Microwave Induced Plasma As An Ion Source for Mass Spectrometry", Spectrochimica Acta, vol. 42B, No. 5, 1987, pp. 705-712.
Hain Seung
Hewlett--Packard Company
LaRoche Eugene R.
Schuette Richard F.
LandOfFree
Microwave resonant cavity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microwave resonant cavity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave resonant cavity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-769358