The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 1999
Filed:
Jan. 31, 1997
Richard J Pasco, Williamsport, PA (US);
Litton Systems, Inc., Woodland Hills, CA (US);
Abstract
A crossed-field device comprises a cathode having an electron emitting surface and an anode structure radially spaced from the cathode. The anode structure has a plurality of vanes extending in radial directions of the cathode with an interaction region defined between the electron emitting surface of the cathode and innermost radial ends of the anode vanes. First and second magnetic polepieces are respectively disposed at first and second axial ends of the cathode and have respective magnets coupled magnetically thereto. The polepieces direct magnetic flux from the respective magnets to define an axial magnetic field through the interaction region. The polepieces are electrically isolated from the anode structure. An anode modulator is adapted to provide a voltage potential between the anode structure and the cathode to define a radial electric field through the interaction region. A polepiece modulator is adapted to provide a voltage potential between the polepieces to define an axial electric field through the interaction region, whereby a frequency characteristic of the crossed-field device is adjusted by varying the axial electric field.