EP 0174579 A2 19860319 - Shaped beam antenna.
Title (en)
Shaped beam antenna.
Title (de)
Antenne mit geformtem Bündel.
Title (fr)
Antenne à faisceau conformé.
Publication
Application
Priority
- JP 16734885 A 19850729
- JP 18428884 A 19840903
- JP 18429084 A 19840903
Abstract (en)
A shaped beam antenna comprises an array antenna having a planar surface on which a plurality of radiating elements are arranged, and a main reflector disposed behind with respect to the radiating direction of the array antenna. The main reflector comprises a plurality of partial cylindrical or planar reflector segments. Where Cartesian coordinates is assumed having an origin in the center of the planar surface of the array antenna, an X-axis extending in a vertical center axis of the array antenna, a Z-axis extending in a direction perpendicular to the planar surface through the origin, and a Y-axis, extending in a direction perpendicular to the X- and Z-axes through the origin, the shaped beam antenna is characterized in that the longitudinal axis of each reflector segments is in parallel with the X-axis, the main reflector is symmetrical with respect to the X-Z plane and formed convex in a negative direction of the Z-axis, and each radiating element is disposed so that its excitation amplitude is symmetrical with respect to the Y-Z plane and its excitation phase is antisymmetrical with respect to the Y-Z plane, whereby a radiation beam formed by the main reflector is symmetrical with respect to the Z-axis on the Y-Z plane and is asymmetrical with respect to the Z-axis on said X-Z plane. Thus, with this antenna, a good beam shaping performance and an excellent cross polarization discrimination can be obtained.
IPC 1-7
IPC 8 full level
H01Q 13/02 (2006.01); H01Q 17/00 (2006.01); H01Q 19/17 (2006.01); H01Q 21/00 (2006.01)
CPC (source: EP)
H01Q 13/0233 (2013.01); H01Q 17/001 (2013.01); H01Q 19/17 (2013.01); H01Q 21/0043 (2013.01)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0174579 A2 19860319; EP 0174579 A3 19870603; AU 4696485 A 19860313; CA 1238714 A 19880628
DOCDB simple family (application)
EP 85111057 A 19850902; AU 4696485 A 19850902; CA 489794 A 19850830