Design and Analysis of Slotted Ground Rectangular Patch Antenna for Worldwide Interoperability for Microwave Access, Wireless Local Area Network, Ultra Wideband and X-Band Applications

Abstract

In the present letter, we are designing a co-planar waveguide rectangular patch antenna with an area of $(\mathbf{Lp}\times \mathbf{Wp}) \mathbf{mm}^{\mathbf{2}}$. This is exciting by using a feed line having the dimensions of $(\mathbf{Lf}\times \mathbf{WD})\ \mathbf{mm}^{\mathbf{2}}$. An FR-4 substrate occupying the volume of $(\mathbf{L}\times \mathbf{W}\times \mathbf{R})\ \mathbf{mm}^{\mathbf{3}}$ is used. A ground plane having an area of $(\mathbf{Lg}\times \mathbf{Wg})\ \mathbf{mm}^{\mathbf{2}}$ is designed on the top of the substrate and an aperture of $(\mathbf{Ls}\times \mathbf{Ws})\ \mathbf{mm}^{\mathbf{2}}$ is cut on the ground to improve the bandwidth characteristics. The s designing and simulation was done by using microwave studio computer simulation technology (MS-CST). From the results, it is observed the proposed structure is operating at 3.4 GHz (i.e., IEEE 802.16-WiMAX-worldwide interoperability for microwave access), 5.15 GHz (i.e., IEEE 802.11a-WLAN-wireless local area network), 3.1-10.6 GHz (UWB-ultra-wideband), and 8–12 GHz (X-band) applications. And it is also observed that the proposed antenna exhibits nearly Omni directional radiation patterns, return loss (S11) $< -\mathbf{10}\ \mathbf{dB}$ and VSWR (voltage standing wave ratio) $< \mathbf{2}$ and gain $\leq \mathbf{5}\ \mathbf{dB}$ except at the resonant frequency, 6.75 GHz within the UWB range.