Compact Combline Filter Embedded in a Bed of Nails

Autor: Vicente E. Boria-Esbert, Mariano Baquero-Escudero, Alejandro Valero-Nogueira, Bernardo Bernardo-Clemente, Miguel Ferrando-Rocher
Přispěvatelé: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Grupo de Microondas y Electromagnetismo Computacional Aplicado (GMECA)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
ISSN: 2016-7970
Popis: [EN] In this paper, we propose a compact topology for high-frequency bandpass filters using coaxial cavities embedded in a bed of nails, including a complete design procedure combining equivalent circuit models and full-wave simulators. The resonance generated around a shortened cylindrical nail of the bed hosting structure is used as the basic element of the proposed filter, which is fed through groove gap waveguides. For design purposes, an equivalent circuit model of the considered resonance is first obtained, and then the coupling levels between resonators are recovered with the distance between adjacent shortened nails. In order to validate the proposed structure and its design procedure, a filter prototype with a bandpass response (centered at 30 GHz and with relative bandwidth of 1.7%) has been designed, manufactured, and measured. Good experimental results, in terms of insertion losses (with a minimum value of 1.6 dB) and return losses (greater than 16.6 dB in the whole passband), have been achieved.
This work was supported in part by the Spanish Government, Ministry of Economy, National Program of Research, Development and Innovation through the project SATCOM-KA "New antennas for mobile satellite communications in Ka-band" under Project TEC2016-79700-C2-1-R and in part by the "Demostradores tecnologicos de filtros y multiplexores con respuestas selectivas y sintonizables en nuevas guias compactas para aplicaciones espaciales" under Project TEC2016-75934-C4-1-R.
Databáze: OpenAIRE