Virtual cathode microwave generator having annular anode slit
Abstract
A microwave generator is provided for generating microwaves substantially from virtual cathode oscillation. Electrons are emitted from a cathode and accelerated to an anode which is spaced apart from the cathode. The anode has an annular slit therethrough effective to form the virtual cathode. The anode is at least one range thickness relative to electrons reflecting from the virtual cathode. A magnet is provided to produce an optimum magnetic field having the field strength effective to form an annular beam from the emitted electrons in substantial alignment with the annular anode slit. The magnetic field, however, does permit the reflected electrons to axially diverge from the annular beam. The reflected electrons are absorbed by the anode in returning to the real cathode, such that substantially no reflexing electrons occur. The resulting microwaves are produced with a single dominant mode and are substantially monochromatic relative to conventional virtual cathode microwave generators.
- Inventors:
-
- Los Alamos, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 866525
- Patent Number(s):
- 4730170
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- virtual; cathode; microwave; generator; annular; anode; slit; provided; generating; microwaves; substantially; oscillation; electrons; emitted; accelerated; spaced; apart; therethrough; effective; form; range; thickness; relative; reflecting; magnet; produce; optimum; magnetic; field; strength; beam; substantial; alignment; permit; reflected; axially; diverge; absorbed; returning; reflexing; occur; resulting; produced; single; dominant; mode; monochromatic; conventional; generators; microwave generator; magnetic field; spaced apart; field strength; wave generator; virtual cathode; annular anode; substantially monochromatic; emitted electrons; optimum magnetic; /331/315/
Citation Formats
Kwan, Thomas J. T., and Snell, Charles M. Virtual cathode microwave generator having annular anode slit. United States: N. p., 1988.
Web.
Kwan, Thomas J. T., & Snell, Charles M. Virtual cathode microwave generator having annular anode slit. United States.
Kwan, Thomas J. T., and Snell, Charles M. Fri .
"Virtual cathode microwave generator having annular anode slit". United States. https://www.osti.gov/servlets/purl/866525.
@article{osti_866525,
title = {Virtual cathode microwave generator having annular anode slit},
author = {Kwan, Thomas J. T. and Snell, Charles M},
abstractNote = {A microwave generator is provided for generating microwaves substantially from virtual cathode oscillation. Electrons are emitted from a cathode and accelerated to an anode which is spaced apart from the cathode. The anode has an annular slit therethrough effective to form the virtual cathode. The anode is at least one range thickness relative to electrons reflecting from the virtual cathode. A magnet is provided to produce an optimum magnetic field having the field strength effective to form an annular beam from the emitted electrons in substantial alignment with the annular anode slit. The magnetic field, however, does permit the reflected electrons to axially diverge from the annular beam. The reflected electrons are absorbed by the anode in returning to the real cathode, such that substantially no reflexing electrons occur. The resulting microwaves are produced with a single dominant mode and are substantially monochromatic relative to conventional virtual cathode microwave generators.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}