Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29435
Title: | Superconducting spiral bandpass filter designed by a pseudo-Fourier technique | Authors: | Huang, Frederick BOLLI, Pietro CRESCI, Luca MARIOTTI, SERGIO PANELLA, Dario Lopez-Perez, Jose A. Garcia, Pablo |
Issue Date: | 2018 | Journal: | IET MICROWAVES, ANTENNAS & PROPAGATION | Number: | 12 | Issue: | 8 | First Page: | 1293 | Abstract: | An iterative technique to adjust ripple in a bandpass filter has been developed by curve-fitting numerical data. It gives an approximate relation of ripple against filter coupling coefficients and resonator resonant frequencies instead of finding a Jacobian matrix for each individual filter, in exchange for making more iterations. Numerical examples show reasonable convergence for Chebyshev filters up to the 16th-order, coupled quadruplets, coupled triplets and folded cross-coupled filters. A bandpass filter for a radio telescope in Yebes, Spain is designed and measured, a tenth-order superconducting spiral filter with 7% bandwidth, 2295 MHz centre frequency, <0.1 dB ripple and overall substrate size 30 mm × 8 mm. The 11 iterative simulations totalled 8.5 h of computer processing time. | URI: | http://hdl.handle.net/20.500.12386/29435 | URL: | https://ietresearch.onlinelibrary.wiley.com/doi/10.1049/iet-map.2017.0940 | ISSN: | 1751-8725 | DOI: | 10.1049/iet-map.2017.0940 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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POSTPRINT.pdf | postprint | 2.18 MB | Adobe PDF | View/Open |
08382354.pdf | [Administrators only] | 5.27 MB | Adobe PDF |
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