A new 4 x 4 rectangular waveguide short-slot coupler in 3d printed technology at ku-band
EntityUAM. Departamento de Ingeniería Informática
10.3390/electronics9040610Electronics 9.4 (2020): 610
Funded byThis work was supported by the Spanish Government (Agencia Estatal de Investigación, Fondo Europeo de Desarrollo Regional: AEI/FEDER, UE) under Grants TEC2016-76070-C3-1/2-R
ProjectGobierno de España. TEC2016-76070-C3-1/2-R
SubjectsAdditive manufacturing; Directional couplers; Rectangular waveguide; Riblet-type coupler; Informática
Rights© The author(s)
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
This paper presents a novel design of an eight-port directional coupler with a very compact structure and simple manufacturing, working in the Ku frequency band. One of the main goals of the design was to ease the manufacturing with a simple structure: the coupler consisted of four rectangular waveguide input ports, four rectangular waveguide output ports, and a central coupling region with only H-plane variation. A prototype was fabricated using additive manufacturing, with a combination of 3D printing and silver coating metallization. The obtained performance showed a theoretical bandwidth of 6.6% with 20 dB return loss for the input/output ports. Good agreement between simulations and measurements was obtained, validating the proposed coupler as a good trade-off for low cost 3D printing, compactness, and high performance for systems requiring a high number of ports as in phase arrays or Butler matrices.
Google Scholar:Haro-Baez, Raúl V. - Ruiz Cruz, Jorge Alfonso - Córcoles Ortega, Juan - Montejo-Garai, José R. - Rebollar, Jesús M.
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