volume | PIER Journals

Abstract

A pentagon shaped ultra-wideband (UWB) antenna with a high selective notch at wireless local area network (WLAN) band is presented. An inverted L-shaped stub is incorporated with a pentagon-shaped metallic patch fabricated on an FR4 substrate. Also, a partial ground plane with a slot has been used to achieve UWB operation. Two structures are embedded into a patch to realize a rectangular notch. An electromagnetic band gap (EBG) structure is placed on the opposite side of the patch, and a rectangular complementary split ring resonator(RCSRR) is embedded in the patch. With the coupling of two structures, their notch bands are adjusted to achieve a rectangular notch. The bandwidth, upper and lower frequencies of the notch can be adjusted by varying dimensions of RCSRR and EBG. The measured and simulated results show S₁₁ ≤ -10 dB for 3.1 GHz-12.5 GHz with a notch at the WLAN band from 5 GHz to 5.91 GHz. Also, the proposed design has a stable radiation pattern and gain with a peak value of 3.5 dB at 9.5 GHz and -6 dB at 5.1 GHz. The miniaturized size of the proposed design (21.5 mm × 27.5 mm × 1.6 mm) with ultra wide bandwidth makes it suitable for wireless applications.

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Dr. Sapna Arora

Dr. Sharad Sharma

Dr. Rohit Anand

Dr. Garima Shrivastva