• MURTHI MAHADEVA NAIK G
• Naveen Kumar S K

This paper presents bandwidth enhancement in a Rectangular Microstrip Patch Antenna (RMPA) using Defected Ground Structure (DGS) for WLAN (Wireless Local Area Networks, 5.2/5.8 GHz) application. The RMPA is designed using FR4 epoxy substrate with a dielectric constant r = 4.4 and having thickness h = 1.6 mm. The conventional RMPA is resonating at 4.65 GHz with an impedance matching of -16 dB and having impedance bandwidth of 200 MHz. The conventional RMPA gives co-pol peak gain of 5.64 dBi and the H – plane cross-pol levels are symmetrical at -20 dB. The conventional RMPA is modified by defecting I – shaped slot in the ground plane as DGS element, its dimension is optimized and approximately equals to (2 X /2.2) mm2. The DGS slot enhances the impedance bandwidth by maintaining S11 below -10 dB from 4.6 GHz to 5.54 GHz. The modified RMPA enhances the bandwidth from 200 MHz to 0.94 GHz and is almost 5 times the conventional configuration.

Rectangular Microstrip patch Antenna, cross polarization, Defected ground Structure, Wireless Local Area Networks.

"Enhancement of Bandwidth in a Probe-Fed Rectangular Microstrip Patch Antenna using I – shaped Defected Ground Structure for Wireless Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.416-423, September-2018, Available :http://www.jetir.org/papers/JETIR1809085.pdf

"Enhancement of Bandwidth in a Probe-Fed Rectangular Microstrip Patch Antenna using I – shaped Defected Ground Structure for Wireless Application", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp416-423, September-2018, Available at : http://www.jetir.org/papers/JETIR1809085.pdf