Microwave waveguide comprising a cavity formed by layers having conductive surfaces and a dielectric strip disposed in the cavity

A process for manufacturing a microwave component comprising the following steps:

• providing an upper layer and a lower layer respectively having at least one electrically conductive surface;
• providing a central layer having one recess or a plurality of recesses, the recess or the plurality of recesses being defined by opposite lateral edges formed in the central layer;
• and
• assembling the upper layer, the central layer and the lower layer such that the central layer is interposed between the upper layer and the lower layer, and the central layer is distinct from the upper layer and from the lower layer;
• wherein the upper layer, the central layer and the lower layer define a zone of propagation for an electromagnetic wave, the propagation zone extending along a propagation axis, and comprising a cavity, the cavity being bounded by the upper layer, the lower layer, and the lateral edges of the central layer;
• and
• wherein the method further comprises producing and placing a dielectric strip, such that after the assembling, the dielectric strip is placed in the propagation zone and is defined in one of the upper layer and the lower layer, or such that after the assembling, the dielectric strip is placed in the propagation zone and in the cavity separated from the lateral edges of the central layer.

A microwave component including a waveguide comprising an upper layer having at least one electrically conductive surface, a lower layer having at least one electrically conductive surface, and a central layer interposed between the upper layer and the lower layer, the central layer being distinct from the upper layer and from the lower layer,

• wherein each of the upper layer, the lower layer and the central layer comprises an electrically conductive upper sublayer, an electrically conductive lower sublayer, and a dielectric central sublayer interposed between the electrically conductive upper sublayer and the electrically conductive lower sublayer;
• wherein the upper layer, the central layer, and the lower layer define a zone of propagation for an electromagnetic wave,
• wherein the propagation zone extends along a propagation axis, and comprises a cavity, the cavity being bounded by the upper layer, the lower layer, and, laterally, by two opposite lateral edges of the central layer,
• wherein the waveguide comprises at least one dielectric strip placed in the propagation zone, the at least one dielectric strip being defined in one of the upper layer and the lower layer or being placed in the cavity away from the lateral edges of the central layer.