Parametric study and Analysis of Band Stop Characteristics for a Compact UWB Antenna with Tri-band notches

Abstract

In this article, equivalent circuit modeling with study and analysis of band notch characteristics for a triple band notched UWB antenna has been discussed to develop a better understanding of the antenna functioning and its behavior. A small square ultra wideband antenna having overall size of 24 x 31 mm 2 with tri-band rejections is designed and simulated using HFSS software. Very narrow band notching is accomplished by placing C slots and inverted C slot of different dimensions on the radiating patch which makes maximum space utilization without performance deterioration. The antenna operates from 3.1 to 14 GHz (VSWR < 2) with the presence of 3 narrow band notches (VSWR >2) of 3.3-3.7 GHz (WiMAX), 5.1-5.4 GHz (Lower WLAN and HIPERLAN/2) and 5.7-6 GHz (Upper WLAN) as shown by the simulated and measured results (VSWR<2) of the UWB antenna, with and without the presence of triple notches, thus utilizing the maximum UWB bandwidth. The radiation pattern plots for simulated and measured results are also presented to validate the working of the antenna. This antenna can be a respectable candidate for future European and USA high capacity UWB applications. The group delay and peak gain plots are also found to be stable in the range of operation of the antenna. The study and analysis of the band notching is discoursed in terms of current distribution and impedance plots to provide a greater and better perception into the working of the antenna and hence an equivalent circuit for the tri-band notched UWB antenna has been proposed.

A new type of compact ultra‐wideband planar fractal antenna with WLAN band rejection

“…Fractal geometries are also commonly used to achieve UWB characteristics with lower cutoff frequency . In the published literature, several UWB antenna designs with notch band characteristics in allocated frequency bands have been reported …”

Design and analysis of UWB antenna with quintuple band-notched and wide-band rejection characteristics

“…Over the years, different techniques have been developed to realize the band-notching characteristics for UWB antennas. These include the etching square slots [9,10], U-shaped slots [8], T-shaped slots [11], C-shaped slots [1,12], the split-ring resonator (SRR) [13][14][15][16][17], as well as rectangular strips [4,7,18,19] and T-shaped strips [20]. However, the UWB antenna design with band-notched characteristics still faces many challenges, for example, to realize multiple band-notched characteristics in a limited radiating patch, and to control multiple band-notched frequencies for the different operating environment.…”

“…However, the UWB antenna design with band-notched characteristics still faces many challenges, for example, to realize multiple band-notched characteristics in a limited radiating patch, and to control multiple band-notched frequencies for the different operating environment. Till now, most of the band-notched UWB antennas were designed with single [6,7,13,[21][22][23][24][25], dual [1,4,14,19,[26][27][28], or triple band-notched characteristics [12,[15][16][17]29]. Few had quad [30][31][32][33] or quintuple band-notched characteristics [34][35][36][37][38].…”