scholarly journals Flexible Design Method for Microstrip Bandstop, Highpass, and Bandpass Filters Using Similar Defected Ground Structures

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 98453-98461 ◽  
Author(s):  
Wentao Yuan ◽  
Xiuhan Liu ◽  
Hongshu Lu ◽  
Weiwei Wu ◽  
Naichang Yuan
Keyword(s):  
Design Method ◽  
Bandpass Filters ◽  
Flexible Design ◽  
Defected Ground Structures ◽  
Ground Structures

scholarly journals New Design Method of UWB Microstrip Filters Using Adaptive Genetic Algorithms with Defected Ground Structures

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Amir Reza Dastkhosh ◽  
Gholamreza Dadashzadeh ◽  
Mohammad Hossein Sedaaghi
Keyword(s):  
Genetic Algorithms ◽  
Performance Optimization ◽  
Design Method ◽  
60 Ghz ◽  
Small Surface ◽  
High Attenuation ◽  
Adaptive Genetic Algorithms ◽  
Individual Fitness ◽  
Defected Ground Structures ◽  
Ground Structures

The effects of adaptive genetic algorithms (AGAs) and defected ground structures (DGSs) on performance optimization of tapered microstrip filter are investigated. The proposed structure achieves an ultra wide stopband with high attenuation within a small surface area, as well as 45% smaller size, in comparison with conventional filters. The parameters of the filter are optimized using in-home AGA code. In the proposed AGA algorithm, the crossover and mutation probabilities are adaptively changed according to the value of individual fitness. Then by utilizing the proposed DGS, a compact S-band lowpass filter with ultra-wide spurious free window is obtained. The proposed filter achieves an insertion loss of 0.8 dB from DC up to 4 GHz and 21 dB rejection in the stopband from 4.3 up to 60 GHz. The fabricated and measured results exhibit good agreement with the simulated results. They demonstrate that combining AGA and DGS yields best possible response for this group of filters.

Phase shifter with high phase shifts using defected ground structures

2005 ◽  
Vol 41 (4) ◽  
pp. 196 ◽  
Author(s):  
S.M. Han ◽  
C.-S. Kim ◽  
D. Ahn ◽  
T. Itoh
Keyword(s):  
Phase Shifter ◽  
Phase Shifts ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
High Phase

Design and analysis of a planar UWB bandpass filter with stopband characteristics using MMR technique

2021 ◽  
pp. 1-8
Author(s):  
Gaurav Saxena ◽  
Priyanka Jain ◽  
Y. K. Awasthi
Keyword(s):  
Return Loss ◽  
Group Delay ◽  
Bandpass Filter ◽  
Ground Plane ◽  
Cost Effective ◽  
Ultra Wideband ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Multi Mode ◽  
Mode Resonator

Abstract In this paper, a ultra-wideband (UWB) bandpass filter with stopband characteristics is presented using a multi-mode resonator (MMR) technique. An MMR is formed by loading three dumbbell-shaped (Mickey and circular) shunt stubs placed in the center and two symmetrical locations from ports, respectively. Three circular and arrowhead defected ground structures on the ground plane are introduced to achieve UWB bandwidth with a better roll-off rate. The proposed filter exhibits stopband characteristics from 10.8 to 20 GHz with a 0.4 dB return loss. The group delay and roll-off rate of the designed filter are <0.30 ns in the passband and 16 dB/GHz at lower and higher cut-off frequencies, respectively. The dimension of the filter is 0.74λg × 0.67λg mm2 and was fabricated on a cost-effective substrate. All simulated results are verified through the experimental results.

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