Ultra wideband bandpass filters with specified relative bandwidth
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Algorithm for the realization of the broad range of values of wide relative bandwidth (RBW) bandpass filter is introduced. Algorithm is based on periodic ideal cells each with short-ended stub. Theory is developed for a symmetrical cell with proportional transmission lines, nonuniform or uniform, in term of characteristic impedance. The theory is applied for the uniform transmission lines. Simple equation of the ratio between characteristic impendence of the short-ended stub and the characteristic impendences of the main lines is given for the broad range of RBW. Realizable filters are for the very wide RBW up to over 1.5 (150%). Technology is chosen in microstrip with vias for the short ends. It is without coupling, without defected ground structure (DGS) and only with a single layer. The procedure is tested on the fabricated filters for very wide RBW of 1.5 (150%). Agreement between measurements and simulations is excellent.
Keywords:
filter design / microstrip / microwave / periodic structure / ultra wideband bandpass filterSource:
Frequenz, 2022, 76, 1-2, 9-16Publisher:
- Berlin : Walter de Gruyter GmbH
Funding / projects:
DOI: 10.1515/freq-2021-0034
ISSN: 0016-1136; 2191-6349
WoS: 000737409100001
Scopus: 2-s2.0-85118211802
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IHTMTY - JOUR AU - Nešić, Dušan AU - Milošević, Tomislav AU - Kolundžija, Branko PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5416 AB - Algorithm for the realization of the broad range of values of wide relative bandwidth (RBW) bandpass filter is introduced. Algorithm is based on periodic ideal cells each with short-ended stub. Theory is developed for a symmetrical cell with proportional transmission lines, nonuniform or uniform, in term of characteristic impedance. The theory is applied for the uniform transmission lines. Simple equation of the ratio between characteristic impendence of the short-ended stub and the characteristic impendences of the main lines is given for the broad range of RBW. Realizable filters are for the very wide RBW up to over 1.5 (150%). Technology is chosen in microstrip with vias for the short ends. It is without coupling, without defected ground structure (DGS) and only with a single layer. The procedure is tested on the fabricated filters for very wide RBW of 1.5 (150%). Agreement between measurements and simulations is excellent. PB - Berlin : Walter de Gruyter GmbH T2 - Frequenz T1 - Ultra wideband bandpass filters with specified relative bandwidth VL - 76 IS - 1-2 SP - 9 EP - 16 DO - 10.1515/freq-2021-0034 ER -
@article{ author = "Nešić, Dušan and Milošević, Tomislav and Kolundžija, Branko", year = "2022", abstract = "Algorithm for the realization of the broad range of values of wide relative bandwidth (RBW) bandpass filter is introduced. Algorithm is based on periodic ideal cells each with short-ended stub. Theory is developed for a symmetrical cell with proportional transmission lines, nonuniform or uniform, in term of characteristic impedance. The theory is applied for the uniform transmission lines. Simple equation of the ratio between characteristic impendence of the short-ended stub and the characteristic impendences of the main lines is given for the broad range of RBW. Realizable filters are for the very wide RBW up to over 1.5 (150%). Technology is chosen in microstrip with vias for the short ends. It is without coupling, without defected ground structure (DGS) and only with a single layer. The procedure is tested on the fabricated filters for very wide RBW of 1.5 (150%). Agreement between measurements and simulations is excellent.", publisher = "Berlin : Walter de Gruyter GmbH", journal = "Frequenz", title = "Ultra wideband bandpass filters with specified relative bandwidth", volume = "76", number = "1-2", pages = "9-16", doi = "10.1515/freq-2021-0034" }
Nešić, D., Milošević, T.,& Kolundžija, B.. (2022). Ultra wideband bandpass filters with specified relative bandwidth. in Frequenz Berlin : Walter de Gruyter GmbH., 76(1-2), 9-16. https://doi.org/10.1515/freq-2021-0034
Nešić D, Milošević T, Kolundžija B. Ultra wideband bandpass filters with specified relative bandwidth. in Frequenz. 2022;76(1-2):9-16. doi:10.1515/freq-2021-0034 .
Nešić, Dušan, Milošević, Tomislav, Kolundžija, Branko, "Ultra wideband bandpass filters with specified relative bandwidth" in Frequenz, 76, no. 1-2 (2022):9-16, https://doi.org/10.1515/freq-2021-0034 . .