EP 0042611 B1 19840919 - CONDUCTIVE SCREEN FOR CIRCULARLY POLARISING ELECTROMAGNETIC WAVES
Title (en)
CONDUCTIVE SCREEN FOR CIRCULARLY POLARISING ELECTROMAGNETIC WAVES
Publication
Application
Priority
DE 3023561 A 19800624
Abstract (en)
[origin: US4437099A] The invention relates to apparatus for converting electromagnetic waves with a particular polarization into waves having circular polarization wherein a single or multi-layer conductor grid structure is placed in front of the radiation aperture. If it is necessary due to spatial requirements of the radome, the circular polarization grid may be non-planar and according to the invention the geometric development of the grid structure can be determined by projecting a desired grid structure disposed in the radiation aperture plane upon a non-planar such as a cone-shaped surface. The manufacture of the grid structure can be accomplished by first forming the grid structure on a surface such as plastic with conducting strips or members formed thereon and so arranged such that when the plastic sheet is formed into a cone by removing a pie-shaped segment the desired non-planar pattern results.
IPC 1-7
IPC 8 full level
H01Q 1/42 (2006.01); H01Q 15/24 (2006.01)
CPC (source: EP US)
H01Q 1/425 (2013.01 - EP US); H01Q 15/244 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH FR GB IT LI NL
DOCDB simple family (publication)
EP 0042611 A1 19811230; EP 0042611 B1 19840919; DE 3023561 A1 19820114; DE 3023561 C2 19860102; US 4437099 A 19840313
DOCDB simple family (application)
EP 81104792 A 19810622; DE 3023561 A 19800624; US 24612281 A 19810320