| 摘要 |
<p>Microwave-frequency filtering structure (20) characterized in that it comprises: - two dielectric layers (21, 23) separated by a conducting layer (22), the conducting layer (22) being etched in the pattern of a filter, - the upper and lower exterior faces of the stack of two dielectric layers (21, 23) being covered over the larger part of their surface by a conducting plane constituting ground planes of the structure (20), - said ground planes being interlinked by a metallization of the periphery of the structure (20), except in the vicinity of microwave-frequency ports, - two identical devices (24, 25), one of them being an input transition device (24) and one being an output transition device (25), each allowing the passage from a microstrip mode to a stripline mode and vice versa, configured in such a way that the geometry of the transition device (24, 25) is optimized so as to minimize the standing wave ratios at the ports of the filter (22), and to also minimize the excitation and the coupling of the TE10 mode, - at least two conducting pillars (27) perpendicular to the plane of the structure (20) and situated as close as possible to its principal axis, without there being any coupling with the filter (22), and linking the upper and lower ground planes.</p> |
