Wave transmission lines and networks – Long line elements and components – Waveguide elements and components
Reexamination Certificate
2006-05-23
2006-05-23
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Long line elements and components
Waveguide elements and components
Reexamination Certificate
active
07049909
ABSTRACT:
The invention relates to microwave windows used for providing a vacuum seal and transmitting the electromagnetic energy output by a high-power microwave tube. The window comprises a dielectric disk and a prestressing ring, placed around the periphery of the disk, exerts, when at rest, a radial compressive stress all around the disk. In practice, the disk is brazed to the inside of a metal skirt, and the prestressing ring is an annular portion of a holder used for rigidly fastening the microwave window to an output of the microwave tube. The annular portion has an increased thickness and bears locally on the skirt around the disk. The disk may be made of alumina, the metal skirt made of copper, and the holder made of stainless steel. The resistance of the window to thermal stresses is considerably improved thereby.
REFERENCES:
patent: 3156881 (1964-11-01), Bobdley
patent: 3436694 (1969-04-01), Walker
patent: 3936779 (1976-02-01), Achter et al.
patent: 4684908 (1987-08-01), Kuntzmann et al.
Patent Abstract of Japan vol. 1995, No. 08, Sep. 29, 1995 & JP 07 131201 A, May 19, 1995.
Patent Abstract of Japan, vol. 1997, No. 06, Jun. 30, 1997 & JP 09/036602 A, Feb. 7, 1997.
Boghossian Edmond
Denis Philippe
Lee Benny
Lowe Hauptman & Berner LLP
Thales Electron Devices S.A.
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