All-frequency-two-port-quasi-absorptive planar bandpass filter with quasi-flat group delay and multi-transmission-zero extended stopbands
A microwave planar bandpass filter (BPF) with in-band-quasi-flat-group-delay characteristics and two-port-quasi-reflectionless behavior for an infinite spectral range is presented. It is composed of the in-series cascade connection of three multipath-delay-line transversal filtering sections (TFSs)...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/65194 |
| Acceso en línea: | http://hdl.handle.net/10017/65194 https://dx.doi.org/10.1109/LMWT.2023.3321174 |
| Access Level: | acceso abierto |
| Palabra clave: | Absorptive filter Bandpass filter (BPF) Bessel-type filter Group delay Microstrip filter Microwave filter Phase distortion Planar filter Reflectionless filter Transmission zero (TZ) Transversal filtering section (TFS) Telecomunicaciones Telecommunication |
| Sumario: | A microwave planar bandpass filter (BPF) with in-band-quasi-flat-group-delay characteristics and two-port-quasi-reflectionless behavior for an infinite spectral range is presented. It is composed of the in-series cascade connection of three multipath-delay-line transversal filtering sections (TFSs) with Wilkinson-type power-division/combination stages. In this manner, by means of the composite action of these TFSs, an in-band-quasi-Bessel-type bandpass filtering response with multi-transmission-zero (TZ) stopbands and two-port-quasi-absorptive nature for a finite frequency interval is attained. To further extend such quasi-reflectionless bandwidth from dc to infinite theoretically, as well as the stopband range, one-port-quasi-absorptive wide-band filtering cells are inserted at both the input and output accesses of the overall quasi-flat-group-delay BPF. For experimental demonstration purposes, a microstrip prototype centered at 5 GHz is designed, manufactured, and characterized. |
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