Different Feeding Techniques of Microstrip Patch Antennas with Spiral Defected Ground Structure for Size Reduction and Ultra-Wide Band OperationReport as inadecuate




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Different feeding techniques of microstrip patch antennas with different spiral defected ground structures are presented in this paper. The investigated structures illustrate some merits in designing multi-electromagnetic band-gap structures by adjusting the capacitance and changing the inductance through varying the width and length of spiral defected ground structure. Then by applying the three different spirals shapes one, two and four arms as the ground plane of microstrip patch antenna with different feeding techniques to create multi or ultra wide-band, improve the antenna gain and reduce the antenna size, it is found that the four arms spiral defected ground structure of microstrip patch antenna with offset feed gives good performance, electrical size reduction to about 75% as compared to the original patch size and ultra-wide bandwidth extends from 2 GHz up to 12 GHz with ?8 dB impedance bandwidth.

KEYWORDS

Electromagnetic Band-Gap EBG; Defected Ground Structure DGS; Microstrip Patch Antenna MPA

Cite this paper

D. Elsheakh and E. Abdallah -Different Feeding Techniques of Microstrip Patch Antennas with Spiral Defected Ground Structure for Size Reduction and Ultra-Wide Band Operation,- Journal of Electromagnetic Analysis and Applications, Vol. 4 No. 10, 2012, pp. 410-418. doi: 10.4236-jemaa.2012.410056.





Author: Dalia M. Elsheakh, Esmat A. Abdallah

Source: http://www.scirp.org/



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