KYUNG HAN KIM
Engineers in Springfield, VA
License number
Virginia 0402022405
Issued Date
Jun 25, 1991
Expiration Date
Apr 30, 2018
Category
Professional Engineer License
Type
Professional Engineer
Address
Address
Springfield, VA
Professional information
Gyrotron Traveling-Wave Device Including Quarter Wavelength Anti-Reflective Dielectric Layer To Enhance Microwave Absorption
US Patent:
4494039, Jan 15, 1985
Filed:
Oct 19, 1982
Appl. No.:
6/435155
Inventors:
Kyung J. Kim - Burke VA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H01J 2500
US Classification:
315 4
Abstract:
A gyrotron traveling-wave device including quarter wavelength anti-reflece dielectric layers to enhance microwave absorption. A drift tube made from a hollow waveguide is positioned within the gyrotron to surround an electron beam passing from an electron gun to a cavity. A plurality of parallel highly lossy dielectric suppressor rings are interspaced with a plurality of conductive rings positioned to surround the electron beam and located within the waveguide. An anti-reflective layer is formed on the suppressor rings to enhance the absorption by the rings of radiation due to parasitic oscillations by reducing reflections of incident radiation from the suppressor rings. In an alternate embodiment, one or more suppressor rings including an anti-reflecting layer are located within the cavity.