专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

GB9723478D0 Magnetrons 未知
公开(公告)号：GB9723478D0
公开(公告)日：1998-01-07
申请号：GB9723478
申请日：1997-11-07
申请人： EEV LTD
IPC分类号： H01J23/20 , H01J23/10 , H01J23/213 , H01J23/22 , H01J23/40 , H01J25/587
摘要： An anode structure for a magnetron includes T-shape anode vanes 3 having a radially extensive component 3a and a circumferentially extensive portion 3b, the cylindrical faces 3c of the circumferential portions 3b facing a cathode in the complete magnetron. The use of T-shape vanes increases inductance and hence permits low frequency radiation to be generated without increasing the dimensions of the magnetron compared to those of a conventional magnetron. Also, capacitance is increased to give a further reduction in frequency by using more than two anode straps, and preferably four anode straps 5 to 8, at each end of the anode structure. Preferably, the anode structure is incorporated in a magnetron in which a high magnetic field of the order of 500 Gauss for a magnetron operating at 100 MHz is used. The anode shell 2 itself may form part of the magnetic return path.

72. 发明专利

DE69119255T2 未知
公开(公告)号：DE69119255T2
公开(公告)日：1996-09-19
申请号：DE69119255
申请日：1991-02-04
申请人： EEV LTD
发明人： ROBERTSON MARK ANDREW
IPC分类号： H01J23/027 , H01J23/213 , H01J25/593
摘要： A magnetron having a rising sun anode includes a slot 8 which is extensive in a plane transverse to the axis X-X and in which a tuning member 9 is located. The tuning member 9 may be moved inwardly and outwardly to control the frequency of the magnetron output radiation, the member 9 being arranged such that it can intercept one or more of the larger anode cavities by a variable amount to change their resonant characteristics.

74. 发明专利

GB2266180A Magnetron. 未知
公开(公告)号：GB2266180A
公开(公告)日：1993-10-20
申请号：GB9207895
申请日：1992-04-10
申请人： EEV LTD
发明人： BRADY MICHAEL BARRY CLIVE , ROBINSON JULIAN RICHARD
IPC分类号： H01J23/20 , H01J23/213 , H01J23/40 , H01J25/587 , H01J23/18 , H01J23/36
摘要： A magnetron comprises a cathode (2) and an anode (1) having a plurality of circumferentially spaced resonant cavities (4). An output arrangement includes a generally cylindrical resonant cavity (6) disposed co-axially at one end of the plurality of resonant cavities (4) and within an axial magnetic field. Means are provided for coupling energy directly from each adjacent pair of resonant cavities (4) into the cylindrical cavity (6) and for coupling energy from the cylindrical cavity (6) out of the magnetron. The use of a cylindrical resonant cavity (6) ensures that energy can be coupled symmetrically from each adjacent pair of cavities (4).

77. 发明专利

GB2200242B MAGNETRONS 未知
公开(公告)号：GB2200242B
公开(公告)日：1990-10-24
申请号：GB8701235
申请日：1987-01-21
申请人： ENGLISH ELECTRIC VALVE CO LTD
发明人： BRADY MICHAEL BARRY CLIVE
IPC分类号： H01J23/18 , H01J23/213
摘要： A magnetron includes a cathode 2 and vane type anode 3 and is tunable by means of a tuning member 10 which is in the form of an annular plate arranged adjacent resonant cavities in the magnetron. When it is wished to tune the frequency of oscillation of the magnetron, a current is passed along a path defined by the tuning member 10, causing axial forces to be exerted on it and thus causing it to move. Since the current is arranged to pass through the tuning member itself, the device is particularly simple, no actuating mechanisms or drive coils, for example, being necessary.

78. 发明专利

DE3150841C3 未知
公开(公告)号：DE3150841C3
公开(公告)日：1988-05-26
申请号：DE3150841
申请日：1981-12-22
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： MATSUZAKI HIKARU , MATSUZAKI TOSHIYUKU , SIMIZU TATSUO , KOMINE MASATAKA
IPC分类号： H01J9/24 , H01J5/02 , H01J9/14 , H01J23/00 , H01J23/12 , H01J23/20 , H01J23/213 , H01J23/40

79. 发明专利

GB2143672B IMPROVED ELECTRON TUBE 未知
公开(公告)号：GB2143672B
公开(公告)日：1987-02-11
申请号：GB8405126
申请日：1984-02-28
申请人： MA COM INC
发明人： BURR JOHN E
IPC分类号： H01J23/213 , H01J23/12 , H01J25/587 , H02K37/00
摘要： A resonant-cavity type electronic tube having mechanically-operable tuning vanes associated with its resonant-cavity structure and disposed within an evacuable envelope. A support member is provided within the envelope for adjusting the tuning vanes relative to the resonant-cavity structure, so as to tune the frequency of resonance of the structure step-wise in accordance with a predetermined program. The tuning is carried out with a step motor, having a stator and armature with the envelope having a portion extending between the stator and armature for enclosing the armature within the evacuable space containing the tuning vanes and the resonant cavity structure. The armature is coupled to the tuning vanes for altering the position thereof relative to the resonant-cavity structure in fixed relation to the displacement of the armature relative to the stator. Electrical signals are coupled to the stator for establishing a programmable series of displacements of the armature relative to the stator.

80. 发明专利

DE2722276C2 未知
公开(公告)号：DE2722276C2
公开(公告)日：1986-01-02
申请号：DE2722276
申请日：1977-05-17
申请人： N.V. PHILIPS' GLOEILAMPENFABRIEKEN, EINDHOVEN, NL
发明人： MATTSSON, LENNART PER JOEL, JAERFAELLA, SE
IPC分类号： H01J23/20 , H01J23/213
摘要： A tunable magnetron is disclosed comprising a first tuning body rotatable in an annular groove formed by axial slots in the anode plates for rapidly varying the magnetron frequency. The rapid frequency tuning is combined with a slow or quasi-stationary frequency variation produced by a second axially displaceable tuning body having conductive projections which extend into the resonant cavities between adjacent anode plates from the end thereof opposite the first rotatable tuning body. The entire tuning range of the first tuning body is shifted along the frequency scale by an axial displacement of the second tuning body.

你已经成功收藏专利！

检索式保存成功!

IPRDB