A Novel Bandstop Filter Based on Two-Port Coaxial Cavities for the Installation of Metallic Mode Stirrers in Microwave Ovens
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Monzó Cabrera, Juan; Díaz-Morcillo, Alejandro Benedicto; Martínez González, Antonio Manuel; Lozano Guerrero, Antonio José; Fayos Fernández, José; [et al.]Área de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This research was partially funded by Fundación Séneca, Agencia Regional de Ciencia y Tecnología de la Región de Murcia, with the 21640/PDC/21 grant, entitled, “Sistema de Radiación y filtrado para tambores rotatorios en aplicaciones directas para secado de textiles por microondas (ROTDRY)”.Fecha de publicación
2022Editorial
MDPICita bibliográfica
Monzo-Cabrera J, Díaz-Morcillo A, Martínez-Gonzalez A, Lozano-Guerrero A, Fayos-Fernández J, Pérez-Campos R, Pedreño-Molina JL. A Novel Bandstop Filter Based on Two-Port Coaxial Cavities for the Installation of Metallic Mode Stirrers in Microwave Ovens. Electronics. 2022; 11(13):1989. https://doi.org/10.3390/electronics11131989Revisión por pares
siPalabras clave
Microwave heatingMetallic mode stirrer
Microwave applicator
Coaxial filter
Coaxial cavity
Resumen
Metallic stirrers are commonly used in mode-stirred reverberation chambers but are less common in microwave ovens, because the use of a metallic axis creates a coaxial port in the cavity wall where the axis is introduced, which may result in significant microwave leakage levels. However, due to electromagnetic, mechanical, temperature, or chemical requirements, metallic axes must be used in some cases. In this paper, we present a high power coaxial filter that enables the use of metallic stirrers in microwave applications. The filter employs two-port coaxial cavities that are analyzed to determine their design parameters. These cavities are coupled via coaxial lines to achieve proper attenuation levels. The cavities were designed using commercial electromagnetic (EM) software, and a filter prototype was validated using vector network analyzer (VNA) measurements. The simulated and measured results show that a three-stage configuration can achieve attenuations greater than 70 dB at the ...
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