公开(公告)号：EP0935823A1

公开(公告)日：1999-08-18

申请号：EP97941393.0

申请日：1997-09-03

申请人： EMS Technologies, Inc.

发明人： ROBERTS, Roger, G. ,  WILLIAMS, Wyman, L. ,  ALEXANDER, Jeff, M.

IPC分类号： H01P1 ,  H01Q3 ,  H01Q13 ,  H01Q21 ,  H01Q25

CPC分类号： H01Q3/44 ,  H01P1/195 ,  H01Q3/34 ,  H01Q13/22 ,  H01Q21/064 ,  H01Q25/00

摘要： A ferrite scanning line source (100) is formed of a ferrite toroid (102) and one or more dielectric slabs (105, 106) mounted to a side of the toroid (102). A signal propagating through the waveguide is phase shifted by the magnetization of the toroid (102). The further down the toroid the signal propagrates the greater the phase shift that is applied to the signal. Radiators or coupling ports are formed by slots (112) cut in a wall (116) of the waveguide. The phase of the signal radiating from each slot (112) in the line source (100) is shifted from the signal emanating from the preceding and following slot in the line source (100). By properly locating the slots (112) along the line source (100), a composite beam formed by the energy radiating from each slot may be titled to a desired direction.