公开(公告)号：GB2269482A

公开(公告)日：1994-02-09

申请号：GB9216585

申请日：1992-08-05

Applicant: IBM

Inventor： BROWN LUTHER E ,  LUCK GRAHAM ,  GIBBS TERENCE KEITH

IPC: H01Q1/28

Abstract: An antenna arrangement for a helicopter 100 comprises one or more electrically non-conductive rotor blades 101, each having an electrical conductor (210, 310, Fig 2) positioned parallel to the major axis of a respective rotor blade 101. Means are provided to connect the antenna to apparatus for the reception or transmission of radio waves which is located in the fuselage 102. The electrical conductor may be embedded within or affixed to the surface of the rotor blade or it may be a surface coating. The electrical conductor may also be used as a heater filament.

公开(公告)号：NO932389L

公开(公告)日：1994-02-07

申请号：NO932389

申请日：1993-06-30

Applicant: IBM

Inventor： BROWN LUTHER E ,  LUCK GRAHAM ,  GIBBS TERENCE KEITH

IPC: B64C27/04 ,  H01Q1/28 ,  H01Q1/38 ,  H01Q1/44 ,  H01Q1/50 ,  H01Q1/22

Abstract: Disclosed is a combined antenna and helicopter rotor blade 101. The antenna comprises one or more electrically non-conductive rotor blades 101, each having an electrical conductor 210, 310 positioned parallel to the major axis of a respective rotor blade 101. A connection means 410, 412, 510, 521, 620, 623 is provided to connect the antenna to apparatus for the reception or transmission of radio waves which is located in the fuselage 102. Also disclosed is a communications system including apparatus for the transmission or reception of radio waves.

公开(公告)号：FI933478A

公开(公告)日：1994-02-06

申请号：FI933478

申请日：1993-08-05

Applicant: IBM

Inventor： BROWN LUTHER E ,  LUCK GRAHAM ,  GIBBS TERENCE KEITH

IPC: B64C27/04 ,  H01Q1/28 ,  H01Q1/38 ,  H01Q1/44 ,  H01Q1/50

Abstract: Disclosed is a combined antenna and helicopter rotor blade 101. The antenna comprises one or more electrically non-conductive rotor blades 101, each having an electrical conductor 210, 310 positioned parallel to the major axis of a respective rotor blade 101. A connection means 410, 412, 510, 521, 620, 623 is provided to connect the antenna to apparatus for the reception or transmission of radio waves which is located in the fuselage 102. Also disclosed is a communications system including apparatus for the transmission or reception of radio waves.

公开(公告)号：GB2259190A

公开(公告)日：1993-03-03

申请号：GB9118739

申请日：1991-09-02

Applicant: IBM

Inventor： DYE MALCOM ,  GIBBS TERENCE KEITH ,  MERCER IAN DOUGLAS ,  LUCK GRAHAM

IPC: G09G1/00 ,  G09G1/16 ,  H01F29/14 ,  H01F38/02 ,  H01J29/76 ,  H04N3/16 ,  H04N3/237 ,  H04N9/28

Abstract: A non-linear inductor for a CRT line timebase circuit comprises a bobbin 40 carrying an inductive coil 41 and a first permanent magnet 42 adjacent the coil 41. A second permanent magnet 200 is positioned and oriented relative to the first magnet 42 in such a manner that the magnetic field generated by the non-linear inductor is substantially reduced. Because the second magnet 200 is integral, the non linear inductor occupies the same printed circuit board area as a conventional non linear inductor. Furthermore, because the second magnet 200 is oriented to substantially cancel the magnetic field, no additional magnets are required for deflecting the magnet field away from the CRT.