TWO NEW LOADED COMPACT PALNAR ULTRA-WIDEBAND ANTENNAS USING DEFECTED GROUND STRUCTURES

2008 ◽  
Vol 2 ◽  
pp. 165-176 ◽  
Author(s):  
S. Ali Hosseini ◽  
Zahra Atlasbaf ◽  
Keyvan Forooraghi
Keyword(s):  
Ultra Wideband ◽  
Wideband Antennas ◽  
Defected Ground Structures ◽  
Ground Structures

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.

Design of a planar ultra-wideband four-way power divider/combiner using defected ground structures

2017 ◽  
Author(s):  
Michele Squartecchia ◽  
Bruno Cimoli ◽  
Virginio Midili ◽  
Tom K. Johansen ◽  
Vitaliy Zhurbenko
Keyword(s):  
Ultra Wideband ◽  
Power Divider ◽  
Defected Ground Structures ◽  
Ground Structures

Planar UWB Filter with Multiple Notched Band and Stopband with Improved Rejection Level

Frequenz ◽  
2015 ◽  
Vol 69 (5-6) ◽  
Author(s):  
Abu Nasar Ghazali ◽  
Srikanta Pal
Keyword(s):  
Circuit Simulation ◽  
Equivalent Circuit Model ◽  
Ultra Wideband ◽  
Full Wave ◽  
Notched Band ◽  
Rejection Level ◽  
Lumped Equivalent Circuit ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Good Agreement

AbstractAnalysis and realization of a microstrip-based planar ultra-wideband (UWB) filter with integrated multiple notch elimination property and simultaneously extended upper stopband is proposed. Initially, a UWB filter based on back-to-back microstrip-to-CPW technology is designed. Later, multiple spiral defected ground structures (DGS) are embedded to obtain multiple passband notches. Further, double equilateral U (DEU)-type DGS are used to improve upon the rejection level in upper stopband. The multiple passband notches are results of embedded spiral-shaped DGS (SDGS), while extended upper stopband is the outcome of suppressed higher-order spurious harmonics. The flexible dual-attenuation poles of DEU-shaped DGS suppress the stopband harmonics and widen the stopband. An approximate lumped equivalent circuit model of the proposed filter is modelled. The filter is compact and its layout measures 25.26 mm × 11.01 mm. The measured result is in good agreement with the full-wave electromagnetic (EM) simulation and circuit simulation.

A Review of Ultra Wideband Antennas with Band Notched Characteristics

2020 ◽  
Author(s):  
Kavneet Kaur ◽  
Ashwani Kumar ◽  
Narinder Sharma
Keyword(s):  
Ultra Wideband ◽  
Wideband Antennas

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
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