Virtual cathode microwave generator having annular anode slit

Patent · Tue Mar 08 04:00:00 EST 1988

OSTI ID:5019705

Kwan, T J.T.; Snell, C M

A microwave generator using an oscillating virtual cathode is described comprising: a cathode for emitting electrons; an anode for accelerating emitted electrons from the cathode, the anode having an annular slit therethrough effective for forming the virtual cathode and having at least one range thickness relative to electrons reflected from the virtual cathode; and magnet means for producing a magnetic field having a field strength effective to form an annular beam from the emitted electrons in substantial alignment with the annular anode slit and to enable the electrons reflected from the virtual cathode to axially diverge from the annular beam. The reflected electrons return toward the cathode diverge from the annular beam and are absorbed by the anode to substantially eliminate electrons reflexing between the cathode and the virtual cathode.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4730170
• OSTI ID: 5019705
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
ANODES
CATHODES
DESIGN
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
LEPTONS
MAGNETIC FIELDS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
RADIATION SOURCES
RADIATIONS
REFLECTION