Bandwidth Enhancement for Truncated Rectangular Microstrip Antenna Using Stacked Patches and Defected Ground Structure

2013 ◽  
Author(s):  
Siddiqui Naushad Ather ◽  
Rajesh Kumar Verma ◽  
P.K. Singhal
Keyword(s):  
Microstrip Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Bandwidth Enhancement ◽  
Rectangular Microstrip Antenna

scholarly journals Designing Franklin’s Microstrip Antenna with Defected Ground Structure at MMwave Frequency

2021 ◽  
pp. 559-565
Author(s):  
Ahmad Firdausi ◽  
◽  
I Made Dian Wahyudi ◽  
Mudrik Alaydrus
Keyword(s):  
Microstrip Antenna ◽  
Data Access ◽  
Microstrip Antennas ◽  
Reflection Factor ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Ground Field ◽  
Bandwidth Enhancement ◽  
Ground Structure Method ◽  
Gain Enhancement

The development of telecommunication technology is very rapid at this time has entered into 4G technology. Soon, the 5G technology has a fast data access speed of at least 1 Gbps. To support 5G technology is carried out in-depth research, especially in 5G antennas. This study aims to increase the bandwidth of Franklin's five array microstrip antennas using the DGS (Defected Ground Structure) method for 5G antenna applications at an operating frequency of 28 GHz. The research was conducted by doing rectangular defects in the ground field. This research produced an enhanced bandwidth by 1.707 GHz from 1.196 GHz without DGS (Defected Ground Structure) to 2.9 GHz with DGS (Defected Ground Structure). It means a bandwidth enhancement of 142.47%. At the same time, the design achieved a gain enhancement of 141.7 %. Franklin's microstrip antenna output with DGS (Defected Ground Structure) method from the research simulation results are the bandwidth of 2.9 GHz, reflection factor of -52.95 dB, and Gain 11.80 dB. In comparison, the results of antenna measurements that have been fabricated produce bandwidth of 2 GHz, reflection factor -27.72 dB on frequency 26.6 GHz. The deviation between the simulation and measurement may result in inaccuracies during the fabrication process.

Arc-cornered microstrip antenna with defected ground structure for broad banding and improved cross-polarization suppression over whole skew planes

2015 ◽  
Vol 9 (2) ◽  
pp. 437-446 ◽  
Author(s):  
Subhradeep Chakraborty ◽  
Sudipta Chattopadhyay
Keyword(s):  
Microstrip Antenna ◽  
Dominant Mode ◽  
Impedance Bandwidth ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Rectangular Microstrip Antenna ◽  
Opposite Manner ◽  
Sharp Corners ◽  
Polarized Radiation

Defected ground structure (DGS)-integrated arc-cornered rectangular microstrip antenna (RMA) has been investigated to achieve broadband along with high co-polarized to cross-polarized radiation (CP–XP) isolation over principal as well as over skew planes without affecting the dominant mode co-polarized (CP) radiation pattern. The present arc-cornered RMA on circular and rectangular dot-type DGS is thoroughly studied and compared with the conventional rectangular microstrip antenna. In the present paper, a crucial emphasis is given to improve CP–XP isolation in all the skew planes and by employing circular dot-type DGS around 20 dB CP–XP isolation is achieved over whole skew planes as well as in the H-plane with the proposed structure with 20% impedance bandwidth. On the contrary, the CP–XP isolation and impedance bandwidth vary in opposite manner in case of the rectangular dot-type DGS. Around 25 and 10 dB CP–XP isolation with 9 and 22% impedance bandwidth have been obtained with thin and thick rectangular dot-type DGS, respectively. The corners of the patch surface are rounded in such a way to reduce spurious radiations from the sharp corners, which are generally attributed for high XP radiation along the diagonal directions.

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