Abstract
The realization of four finite transmission zeros with high-temperature superconducting microstrip narrow-band bandpass filter using four cross-shaped spiral resonators is described for the fully canonical case. The approach is based on the "N + 2" transversal coupling matrix, which is composed of main direct coupling as well as source/load coupling. The filter, with 0.75% bandwidth, 3.25 MHz, at 408-MHz band, is to be used for a radio astronomy application at Jodrell Bank Observatory, U.K. The measured results match well with both theoretical results and simulated results, except for a small center frequency offset.
Original language | English |
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Pages (from-to) | 3927-3931 |
Number of pages | 5 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 15 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Dec 2005 |
Keywords
- coupling matrix
- bandpass filter
- canonical and source/load
- superconducting
- microstrip