A Novel Microstrip Antenna Using Circular Ring Defected Ground Structure for X Band Applications

Measurement ◽  
2021 ◽  
pp. 109768
Author(s):  
L. MagthelinTherase ◽  
Jayanthy Thangappan
Keyword(s):  
Microstrip Antenna ◽  
Circular Ring ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
X Band

scholarly journals Application of Defected Ground Structure to Suppress Out-of-Band Harmonics for WLAN Microstrip Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Pravin Ratilal Prajapati
Keyword(s):  
Microstrip Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Filter Design ◽  
Stop Band ◽  
Local Area ◽  
Area Network ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Cst Microwave Studio

An application of defected ground structure (DGS) to reduce out-of-band harmonics has been presented. A compact, proximity feed fractal slotted microstrip antenna for wireless local area network (WLAN) applications has been designed. The proposed 3rd iteration reduces antenna size by 43% as compared to rectangular conventional antenna and by introducing H shape DGS, the size of an antenna is further reduced by 3%. The DGS introduces stop band characteristics and suppresses higher harmonics, which are out of the band generated by 1st, 2nd, and 3rd iterations. H shape DGS is etched below the 50 Ω feed line and transmission coefficient parameters (S21) are obtained by CST Microwave Studio software. The values of equivalent L and C model have been extracted using a trial version of the diplexer filter design software. The stop band characteristic of the equivalent LC model also has been simulated by the Advance Digital System software, which gives almost the same response as compared to the simulation of CST Microwave Studio V. 12. The proposed antenna operates from 2.4 GHz to 2.49 GHz, which covers WLAN band and has a gain of 4.46 dB at 2.45 GHz resonance frequency.

scholarly journals Multiband and Miniaturized dual layer Antenna incorporated with FSS and DGS

2018 ◽  
Vol 7 (1) ◽  
pp. 1-6 ◽  
Author(s):  
S. Sah ◽  
M. R. Tripathy ◽  
A. Mittal
Keyword(s):  
Wireless Communication ◽  
Frequency Selective Surfaces ◽  
Printed Antenna ◽  
Defected Ground Structure ◽  
Patch Area ◽  
Ground Structure ◽  
X Band ◽  
Type Frequency ◽  
Frequency Selective

A novel dual  layer rectangular printed Antenna based on loop type Frequency selective surfaces with five concentric rings and I shaped defected ground structure (DGS) is designed and investigated. The deigned antenna is tested for application in C band, WiFi devices and some cordless telephones and X band radiolocation, airborne and naval radars as multiband  operational frequencies are at 5.5GHz, 6.81GHz, 9.3GHz and thus covers two wireless communication band C Band (4 to 8GHz ) and  X band (8 to 12 GHz) The bandwidth is 200MHz, 300MHz and 1GHz respectively and measured gain of this designed antenna are 2.42dBi against 5.5GHz, 2.80dBi against 6.81GHz, 6.76dBi against 9.3GHz. The proposed antenna in addition to multiband operation also exhibits minituarization.The Floquet port technique is used to analyse concentric rings. The Results comparison of proposed structure with the basic dual layer antenna resonaing at 5.5GHz  shows the patch area is reduced by 58.15% while the volume of the antenna is reduced by 81.5%. 

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