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US 4,908,630 AGranted
Medium-frequency rotating joint for antenna
AssigneeThomson-CSF
InventorJean-Michel Clerc
Life of this patent
Estimating the term…
Abstract
Disclosed is a rotating joint used in radars to transmit electrical signals on several channels between a rotating antenna and a fixed support. The pass-band of the matched and coupled circuits of each channel is substantially improved by making these circuits on concentric, circular rings which have metallic ground strips deposited on both faces, said strips being connected by metallized holes, and metallic strips of coils connected by the facing sections of the rings.
Claims12
A rotating joint to transmit signals between a rotating antenna and its fixed support, comprising:
- two cylindrical, concentric parts which are assembled to be rotatable with respect to each other, and which are separated over a certain length by a ring-shaped space;
- a stack of pairs of concentric, coplanar flat insulating rings, disposed in said ring-shaped space, said pairs of rings being separated by pairs of spacers, wherein each ring of a pair comprises two faces, the first faces including first ring shaped to the other ring of said pair, and the second faces including second ring shaped metallic strips along rims of said second faces which are nearest to the other ring of said pair and wherein said rims of said two faces which are the nearest to the other ring of said pair include means for connecting strips of the two faces of a ring, so as to form an open-ended coil winding, to form the rotating joint thus having pairs of matched and inductively coupled circuits which are shielded from one another.
Dependencies are inferred from the claim text.