Claims
- 1. An instrument for microwave-assisted chemical processes that avoids tuning discrepancies that otherwise result based upon the materials being heated, said instrument comprising:
- 2. An instrument according to Claim 1 wherein said microwave source is selected from the group consisting of magnetrons and klystrons.
- 3. An instrument according to Claim 1 wherein said microwave source is a solid state source.
- 4. An instrument according to Claim 1 wherein said waveguide includes seven slots equally spaced from one another by at least 40°.
- 5. An instrument according to Claim 1 wherein said cylindrical cavity completes a full 360°.
- 6. An instrument according to Claim 1 wherein said waveguide arc completes more than 180°.
- 7. An instrument according to Claim 1 wherein said waveguide arc completes between 270°and 360°.
- 8. An instrument according to Claim 1 wherein said slotted openings are oriented parallel to the axis of said cylindrical cavity.
- 9. An instrument according to claim 1 wherein said cylindrical portions of said waveguide are rectangular in cross-section.
- 10. An instrument according to Claim 1 wherein said waveguide is formed of metal.
- 11. An instrument according to Claim 1 and further comprising means for measuring the temperature of items in said cavity.
- 12. An instrument according to Claim 11 wherein said temperature measurement means comprises an infrared photo detector positioned to receive infrared radiation from items in said cavity.
- 13. An instrument according to Claim 11 and further comprising means for moderating the application of microwaves in response to the measured temperature.
- 14. An instrument according to Claim 13 wherein said moderating means comprises a processor in communication with said source and said temperature measurement means for moderating the output of said source in response to the measured temperature.
- 15. An instrument according to Claim 1 and further comprising means for measuring the pressure in said cavity.
- 16. An instrument according to Claim 15 comprising a pressure transducer.
- 17. An instrument according to Claim 15 and further comprising means for moderating the application of microwaves in response to the measured pressure.
- 18. An instrument according to Claim 17 wherein said moderating means comprises a processor in communication with said source and said pressure measurement means for moderating the output of said source in response to the measured pressure.
- 19. An instrument according to Claim 1 and further comprising means for cooling said cavity in response to elevated temperatures resulting from chemical reactions being carried out in said cavity.
- 20. An instrument according to Claim 1 and further comprising a cylindrical dielectric insert inside said cavity and adjacent the circumference of said cavity.
Cross Reference to Related Applications
[0001] This application is a continuation of Serial No. 09/773,846 filed January 31, 2001, now U.S. Patent No. _________.This application is related to copending applications Serial Nos. 10/063,628 filed May 3, 2002 and 10/063,914 filed May 23, 2002.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/773,846 |
Jan 2001 |
US |
Child |
10248052 |
Dec 2002 |
US |