2026-04-17T20:13:30Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2135082025-12-04T21:32:52Zcom_2072_1057col_2072_478812col_2072_478917

00925njm 22002777a 4500 dc Salas Barenys, Arnau author Vidal Martínez, Neus author López Villegas, José María author 2024-06-21T14:07:36Z 2024-06-21T14:07:36Z 2022-02-12 2024-06-21T14:07:41Z This paper presents a 3D topology for high miniaturization of the well-known hybrid branch-line coupler at the UHF band. A preliminary work already proposed the use of helical-microstrip TLs combined with a folded structure for this purpose. This extended work includes a compactness enhancement by loading the TL segments with capacitors. An study of loaded helical-microstrip TL is reported as well. The coupler prototypes have been simulated and fabricated by using a combination of Additive Manufacturing and copper electroplating. The performance results have been compared to the conventional model showing a good agreement. In order to place the designed devices within the state of the art a figure of merit that combines the compactness and the relative bandwidth has been proposed, showing very good results in terms of miniaturization. Impressió 3D Radiofreqüència Topologia Three-dimensional printing Radio frequency Topology Very compact 3D-printed folded branch-line hybrid coupler based on loaded helical-microstrip transmission lines