Patent ID: 7463110

Claim:
Redundant transition device between an electromagnetic waveguide ( 1 ) and at least two redundant circuits ( 2 , 3 ), called processing circuits, this transition device comprising two coplanar lines ( 5 , 6 ) formed on a plate, called a substrate, of dielectric material, each coplanar line comprising, in a same plane, a central transmission strip ( 7 ; 10 ) and two lateral ground strips ( 8 , 9 ; 11 , 12 ), one on each side of said transmission strip, separated from the latter by electromagnetic waveguide slots ( 21 , 22 ; 23 , 24 ), said transmission strip and ground strips extending primarily in a direction called the longitudinal line direction, each coplanar line ( 5 ) having a longitudinal end ( 17 ), called the connection end, for coupling to one ( 2 ) of the processing circuits associated with said coplanar line, wherein: the two coplanar lines ( 5 , 6 ) extend one on each side of a single substrate ( 4 ), on two principal opposite faces ( 27 , 28 ) thereof, the two coplanar lines ( 5 , 6 ) extend, in part at least, into the waveguide ( 1 ); each coplanar line ( 5 ) has a longitudinal end ( 16 ), called the transfer end, opposite its connection end, adapted to channel an electromagnetic wave between the waveguide and the slots ( 21 , 22 ) of said coplanar line; each coplanar line ( 5 , 6 ) is provided with means ( 25 , 26 ), called phase shifting means, adapted for inverting the phase of an electric field on one side of the central transmission strip ( 7 , 10 ) of said coplanar line, in order to transmit electrical energy essentially in a coplanar mode along said transmission strip between the phase shifting means and the processing circuit, and to transmit electrical energy essentially in a guide mode in the waveguide beyond the transfer end.