A Compact Design of UWB Monopole Antenna with Dual Notched Bands for WiMAX Applications

Abstract

A compact conformal coplanar waveguide-fed (CCF) ultra-wideband (UWB) monopole antenna with dual notched bands at 3. GHz for worldwide interoperability for microwave access (WiMAX) applications is presented in this paper. The evolution of the proposed antenna structure is presented in a stepwise manner with the incorporation of a parasitic element and a PIN diode. In the proposed structure, the bandwidth enhancement and band notch are realized by an asymmetric design, which has two I-shaped stub lines parallel to the feed line and two semicircles on both sides of the feed line. The notch is achieved by applying the parasitic element parallel to the patch and placing a PIN diode between the parasitic element and the antenna patch. The volumetric size of the antenna is 24×22×0.035 mm 3 . The proposed structure attains an operating band (VSWR ≤ 2) ranging from 3.1 to 10.6 GHz with a gain close to 3.95 dBi, along with significant efficiency and symmetrical radiation patterns. Parasitic elements are used to improve directivity or gain and reduce the back lobe. By choosing the parasitic elements, different resonant modes can be excited nearby each other, which can provide a wider bandwidth. The proposed antenna is low profile and is designed to be used as a transceiver in UWB communication for WiMAX applications.

Analytical Study on Conformal M-Shaped Monopole Antenna with Metamaterial Loading

“…Elliptical ring-shaped conformal antenna with coplanar waveguide feeding has been designed by Banavathu [1] for ultrawideband applications. Dual notch band conformal UWB antenna has been designed by Gupta [2] to notch WiMAX applications. A wheel-shaped vehicular communication-based antenna has been designed by Sarat [3] and split ring resonator-based antenna has been designed by Anil [4].…”