Circularly polarized annual ring antenna perturbed by asymmetrical defected ground structures for improved gain

2011 ◽  
Vol 53 (12) ◽  
pp. 2994-2996 ◽  
Author(s):  
S. Pyo ◽  
M.-J. Lee ◽  
H.-S. Lee ◽  
S.-H. Kim ◽  
Y.-S. Kim
Keyword(s):  
Annual Ring ◽  
Circularly Polarized ◽  
Ring Antenna ◽  
Defected Ground Structures ◽  
Ground Structures

Triple band circularly polarized compact microstrip antenna with defected ground structure for wireless applications

2015 ◽  
Vol 8 (6) ◽  
pp. 943-953 ◽  
Author(s):  
Mukesh Kumar Khandelwal ◽  
Binod Kumar Kanaujia ◽  
Santanu Dwari ◽  
Sachin Kumar ◽  
Anil Kumar Gautam
Keyword(s):  
Circular Polarization ◽  
Ground Plane ◽  
Defected Ground Structure ◽  
Radiation Characteristics ◽  
Circularly Polarized ◽  
Left Hand ◽  
Right Hand ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Triple Band

Asymmetric slits loaded irregular shaped microstrip patch antenna with three different ground structures is proposed. All three antennas show triple band characteristics. First antenna with regular ground plane resonates at 1.95, 2.4, and 4.90 GHz with good radiation characteristics and shows right-hand circular polarization at 1.95 GHz. 18.75% of compactness is achieved with triple band characteristics. Further, same patch is used with different defected ground structures. Second antenna resonates at 1.85, 2.4, and 4.85 GHz with suppressed cross-polarization level and antenna shows right-hand circular polarization at 1.85 and 4.85 GHz. Compactness is further improved to the value of 22.91%. The third antenna resonates at 1.95, 2.4, and 4.85 GHz with better gain and radiation characteristics and antenna shows right-hand circular polarization at 1.95 and 2.4 GHz. The small frequency ratio f2/f1 is achieved and the value of f2/f1 is 1.29 and 1.23 for second and third configuration, respectively. Proposed structures show right-hand circularly polarized with suppressed left-hand circularly polarized radiations and suitable for fixed mobile wireless communication applications. All structures are analyzed using Ansoft HFSS v.14 based on finite element method and measured results satisfy the simulated results.

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.

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

Circular Aperture Slot Antenna With Common-Mode Rejection Filter Based on Defected Ground Structures for Broad Band

2013 ◽  
Vol 61 (5) ◽  
pp. 2425-2431 ◽  
Author(s):  
Edgar Colin-Beltran ◽  
Alonso Corona-Chavez ◽  
Tatsuo Itoh ◽  
J. Eduardo Mendoza-Torres
Keyword(s):  
Broad Band ◽  
Slot Antenna ◽  
Circular Aperture ◽  
Common Mode ◽  
Rejection Filter ◽  
Defected Ground Structures ◽  
Ground Structures
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