Dassault Electronique

Patrick Pons

Christian Renard

An electromagnetic lens comprises two conductive sides between which there is arranged a cavity provided in its lateral portion with electromagnetic input/output coupling transitions to authorize a set of propagation laws between pairs of such inputs/outputs. Moreover, it comprises, substantially centered in the cavity, a substrate comprising a printed conductive patch of predetermined dimensions, so that the two conductive sides and the patch thus create a suspended three-plate strip line structure. The content of the cavity and the respective geometries of the cavity and of the conductive patch are chosen to comply with the propagation laws.

Electromagnetic lens of the printed circuit type with a suspended strip

A two-directional network antenna includes N parallel and juxtaposed arrays of antenna elements respectively connected to electronic transmission/receiving circuits by an ultrahigh frequency connecting device with phase shifts controlled by a control device. The ultrahigh frequency connecting device comprises N transmission lines respectively associated with N arrays of antenna elements, each transmission line having outputs in propagation lengths which are staggered in relation to their input, which outputs are connected to respective antenna elements of the associated array. The ultrahigh frequency connecting device further comprises at least one electromagnetic lens with P inputs and N outputs respectively connected to N inputs of the transmission lines. The control device comprises switching elements for selecting at least one of the P inputs of the electromagnetic lens to provide scanning in one direction, and elements for causing the frequency of the signals applied to the selected input to vary, to provide scanning in a second, perpendicular direction.

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Rueil, France

Patrick Pons