Dual-mode resonator filter with improved feed-lines for dual-band applications
, , , and | Dec 24, 2020
About this article
Published Online: Dec 24, 2020
Page range: 433 - 435
Received: Oct 24, 2020
DOI: https://doi.org/10.2478/jee-2020-0060
Keywords
© 2020 Shan Shan Gao et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
An improved feedline configuration for dual-mode resonator filter is investigated in this paper. Based on the introduced topology, a dual-mode dual-band bandpass filter with center frequencies of 1.8 and 2.4 GHz is optimally designed, fabricated and tested. The introduced dual-band bandpass filter has simple structure and enables high selectivity to be realized due to two pairs of transmission zeros located near to the lower and upper passband, respectively. Both measured and simulated performances are presented with good consistency.