EP 0273713 A3 19891129 - A LOW-NOISE CROSSED-FIELD AMPLIFIER
Title (en)
A LOW-NOISE CROSSED-FIELD AMPLIFIER
Publication
Application
Priority
US 94626086 A 19861224
Abstract (en)
[origin: EP0273713A2] A crossed-field amplifier circuit has a CFA tube (30) with respective slow-wave structures (31,32) for the anode and the cathode, each with an input (33,35) and an output terminal (34,36) and a magnetic field (28) in the axial direction. Signals of the same frequency from a common source (40) and of controlled phase difference and amplitude (39,41) are applied to the input terminals (33,35) of the anode and cathode slow-wave structures (31,32) whose fringing fields interact with the electron cloud between the anode and the cathode to form well defined cloud fingers (43). The resultant amplification of the input signals provides at the output terminal (34) of the anode an amplified signal having lower random noise than hitherto available from CFA amplifiers.
IPC 1-7
IPC 8 full level
H03F 3/58 (2006.01); H01J 25/44 (2006.01)
CPC (source: EP)
H01J 25/44 (2013.01)
Citation (search report)
- [A] US 4349791 A 19820914 - NICHOLS LAWRENCE J, et al
- [Y] FR 979094 A 19510423 - CSF
- [A] US 2767259 A 19561016 - PETER ROLF W
- [A] US 3646388 A 19720229 - DUDLEY KENNETH W, et al
- [AP] EP 0227463 A2 19870701 - RAYTHEON CO [US]
- [A] EP 0133771 A2 19850306 - VARIAN ASSOCIATES [US]
- [Y] MICROWAVE JOURNAL, vol. 20, no. 7, July 1977, pages 23,24,26,28,32-36,38,40-42, Horizon House, Dedham, US; S.F. KAISEL: "Microwave tube technology review"
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0273713 A2 19880706; EP 0273713 A3 19891129; JP S63246906 A 19881013
DOCDB simple family (application)
EP 87311383 A 19871223; JP 32817787 A 19871224