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2019-01-10
Design and Manufacturing of a Novel Compact 2.4 GHz LPF Using a DGS-DMS Combination and Quasi Octagonal Resonators for Radar and GPS Applications
By
Progress In Electromagnetics Research C, Vol. 90, 15-28, 2019
Abstract
In this paper, a new compact microstrip low-pass filter (LPF) with ultra-wide stopband characteristics is presented. The combinations of DGS-DMS along with quasi octagonal resonators are employed in the design of the proposed filter to achieve compact size and ultra-wide stopband suppression level. The proposed filter has been designed, simulated, optimized and tested. The design procedure is validated using the commercial full-wave EM MoM simulator Microwave Office. Simulated as well as measured results of low-pass filter exhibit sharp roll-off (ξ) of 19 dB/GHz and creating transmission zero at around 7.8 GHz with attenuation level -54 dB. The measurement results show good agreement with the simulations. The cutoff frequency of the proposed low-pass filter is 2.4 GHz with the insertion loss less than 0.3 dB. The ultra wide stop band with over 20 dB attenuation extended from 3.42 GHz to 12 GHz. The spurious passband suppression up to six harmonics (5fc) is achieved for the proposed design. The addition of two parasitics DGS elements in the ground plane leads to suppression of the undesired harmonics and thus to improve the stopband. The size of the whole structure is less as (0.44λgx0.26λg) with λg = 68 mm. The proposed filter is useful for microwave L band, GPS system, and RADAR applications.
Citation
Ahmed Boutejdar Mouloud CHALLAL Sudipta Das Soumia El Hani , "Design and Manufacturing of a Novel Compact 2.4 GHz LPF Using a DGS-DMS Combination and Quasi Octagonal Resonators for Radar and GPS Applications," Progress In Electromagnetics Research C, Vol. 90, 15-28, 2019.
doi:10.2528/PIERC18092107
http://www.jpier.org/PIERC/pier.php?paper=18092107
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