Abstract
A new ultra-wideband bandpass filter is proposed, with a ring resonator and two stepped-impedance stubs to provide good wideband filtering performance and sharp rejection skirts. Interdigital coupled lines are placed at both ends of the ring resonator as input and output feed lines. The use of interdigital coupled lines makes it possible for the first three resonances of the ring resonator to be closer to wideband characteristics. By cutting apertures in the ground plane under the interdigital coupled lines, the coupling effect between the feed lines and the ring resonator can be increased, so that the passband characteristics can be improved. By adding two stepped-impedance stubs to the ring resonator, sharp rejection skirts can be obtained in the passband.
| Original language | English |
|---|---|
| Pages (from-to) | 2047-2051 |
| Number of pages | 5 |
| Journal | Microwave and Optical Technology Letters |
| Volume | 55 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2013 Sept |
Keywords
- bandpass filters
- resonator filters
- ring resonator
- ultra wide band
- wideband
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering