Abstract
In this paper, we show a second-order (four-resonator) absorptive bandstop filter circuit topology which gives a larger bandwidth compared to a first-order topology. Due to the absorptive characteristic, it creates a large attenuation at the center frequency using low-Q resonators. Since low-Q resonators can be used in generating a large attenuation, small-size resonators can be employed in bandstop filter design. Analytic design equations are provided so that a higher-order absorptive bandstop filter can be designed analytically. It is also shown that the second-order filter topology exhibits a better frequency selectivity having a same bandwidth. The proposed filter topology has been applied to a design of a miniaturized low-temperature co-fired ceramic bandstop filter with low-Q resonators. The Q-factor of the lumped-element resonators has been chosen to be 5 for demonstration.
Original language | English |
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Pages (from-to) | 691-698 |
Number of pages | 8 |
Journal | International Journal of Microwave and Wireless Technologies |
Volume | 7 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2015 Dec 1 |
Keywords
- Filters
- Passive components and circuits
ASJC Scopus subject areas
- Electrical and Electronic Engineering