Reactively-loaded non-periodic slow-wave artificial transmission lines for stop band bandwidth enhancement : application to power splitters
Coromina, Jan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Vélez Rasero, Paris (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Bonache Albacete, Jordi (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Aznar Ballesta, Francisco (Universidad Politécnica de Madrid. Departamento de Teoría de la Señal y Comunicaciones)
Fernández-Prieto, Armando (Universidad de Sevilla. Grupo de Microondas)
Martín, Ferran (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date:	2019
Abstract:	This paper presents slow-wave transmission lines based on non-periodic reactive loading. Specifically, the loading elements are stepped impedance shunt stubs (SISS). By sacrificing periodicity using SISS tuned to different frequencies, multiple transmission zeros above the pass band arise, and the rejection level and bandwidth of the stop band is improved as compared with those of periodic structures. Through a proper design, it is possible to achieve compact lines, simultaneously providing the required electrical length and characteristic impedance at the design frequency (dictated by specifications), and efficiently filtering the response at higher frequencies. These lines are applied to the design of a compact power splitter with filtering capability in this work. The length of the splitter, based on a 35. 35 Ω impedance inverter, is reduced by a factor of roughly two. Moreover, harmonic suppression better than 20 dB up to the fourth harmonic is achieved.
Grants:	Ministerio de Ciencia e Innovación IJCI-2017-31339 Ministerio de Economía y Competitividad TEC2017-84724-P Ministerio de Economía y Competitividad TEC2016-75650-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Slow-wave ; Artificial transmission lines ; Power splitters
Published in:	International journal of microwaves and wireless technologies, Vol. 11, special issue 5-6 (June 2019) , p. 475-481, ISSN 1759-0787

DOI: 10.1017/S1759078719000321

Postprint 13 p, 783.1 KB

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