<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A compact microwave lowpass filter based on defected ground structure (DGS), consisting of Yagi slot DGS resonators etched on the metallic ground plane of a microstrip line, is studied in this paper. The proposed lowpass filter was analyzed by parameter sweeping and optimal parameters were selected to design a prototype demonstrator filter. Measurements show the developed lowpass filter exhibits a 3dB cuto frequency of 3.07 GHz with a sharp transition between the passband and the stopband, low insertion loss of less than 0.6 dB in the passband and an in-band group delay of 0.4 ns. Moreover, an ultra-wide suppression band from 3.68 to over 20 GHz with a suppression level generally better than 20 dB is also observed from measurements.</p></abstract>

A compact microwave lowpass filter based on defected ground structure (DGS), consisting of Yagi slot DGS resonators etched on the metallic ground plane of a microstrip line, is studied in this paper. The proposed lowpass filter was analyzed by parameter sweeping and optimal parameters were selected to design a prototype demonstrator filter. Measurements show the developed lowpass filter exhibits a 3dB cuto frequency of 3.07 GHz with a sharp transition between the passband and the stopband, low insertion loss of less than 0.6 dB in the passband and an in-band group delay of 0.4 ns. Moreover, an ultra-wide suppression band from 3.68 to over 20 GHz with a suppression level generally better than 20 dB is also observed from measurements.

A rectangular slot Yagi DGS microstrip filter with sharp rolloff and wide suppression band

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A compact microwave lowpass filter based on defected ground structure (DGS), consisting of Yagi slot DGS resonators etched on the metallic ground plane of a...

A rectangular slot Yagi DGS microstrip filter with sharp rolloff and wide suppression band

Published Online: Aug 10, 2020

Page range: 217 - 221

Received: Apr 19, 2020

DOI: https://doi.org/10.2478/jee-2020-0029

Keywords
defected ground structure (DGS), microwave lowpass filter, suppression band, microstrip line

© 2020 Jing Gong, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A rectangular slot Yagi DGS microstrip filter with sharp rolloff and wide suppression band

Published Online: Aug 10, 2020

Page range: 217 - 221

Received: Apr 19, 2020

DOI: https://doi.org/10.2478/jee-2020-0029

Keywordsdefected ground structure (DGS), microwave lowpass filter, suppression band, microstrip line

© 2020 Jing Gong, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
defected ground structure (DGS), microwave lowpass filter, suppression band, microstrip line