Harmonic suppression in microstrip multistage coupled-ring bandpass filters using defected ground structures

2003 ◽  
Vol 39 (5) ◽  
pp. 351-354 ◽  
Author(s):  
A. Griol ◽  
D. Mira ◽  
J. Marti ◽  
J. L. Corral
Keyword(s):  
Bandpass Filters ◽  
Harmonic Suppression ◽  
Defected Ground Structures ◽  
Ground Structures

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 Harmonic Suppressed Slot Antennas Using Rectangular/Circular Defected Ground Structures

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammad Saeid Ghaffarian ◽  
Gholamreza Moradi ◽  
Reza Zaker
Keyword(s):  
Ground Plane ◽  
Reflection Coefficients ◽  
Harmonic Suppression ◽  
Radiation Patterns ◽  
Harmonic Frequency ◽  
Slot Antennas ◽  
Third Harmonic ◽  
The Third ◽  
Defected Ground Structures ◽  
Ground Structures

Two wide rectangle-shaped microstrip-fed 2.6-GHz slot antennas using defected ground structures (DGSs) with a low design complexity are proposed to achieve wideband harmonic suppression. To accomplish this, two rectangular DGSs (RDGSs) in the first antenna and two circular DGSs (CDGSs) in the second one with various dimensions are etched into the ground plane, which could have a wideband-stop characteristic. Simulated and measured reflection coefficients indicate that the two proposed structures effectively suppress the second and third harmonics up to 23 dB between 3.5 and 10.5 GHz with a maximum ripple of 2.4 dB. In addition, the radiation patterns and peak gains of the antennas can be suppressed at least 17 dB and 7.1 dBi, respectively, at the third harmonic frequency of 7.86 GHz.

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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