Compact ultra‐wideband bandpass filter with configurable stopband based on diamond‐shape resonator
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-10-25 |
| Journal | International Journal of RF and Microwave Computer-Aided Engineering |
| Authors | Jie Cui, Lei Chen, Haojie Chang, Weixing Sheng |
| Institutions | Shanghai University of Electric Power, Nanjing University of Science and Technology |
| Citations | 5 |
Abstract
Section titled “Abstract”An ultra-wideband compact bandpass filter (BPF) with configurable stopband by tuning transmission zeroes is proposed in this paper. The ultra-wideband bandpass response is based on a diamond-shape resonator consisting of a pair of broadside coupled diamond-shape microstrip lines, within which a diamond shape defected ground structure (DGS) is etched in the middle. Flexible transmission zeros realized by open and short stubs can be easily adjusted to improve band selectivity and harmonic suppression. Measurement result shows that the dedicated device has a 3 dB fractional bandwidth of 148% (0.94-6.36 GHz) with 20 dB rejection stopband from 6.87 to 9.7 GHz (77.5%) which agrees good with the simulate performance. The overall size of the proposed BPF is 0.27 λg × 0.23 λg.