A Compact CPW-Fed UWB Antenna with Dual Band-Notched Characteristics

Aiting Wu,Boran Guan

doi:10.1155/2013/594378

Abstract

A compact CPW-fed planar UWB antenna with dual band-notched property is presented. The dual band rejection is achieved by etching a C-shaped slot on the radiation patch and two L-shaped parasitic strips in the ground plane. The experimental and measured results show that the proposed antenna exhibits an impedance bandwidth over an ultrawideband frequency range from 2.4 to 12.5 GHz with VSWR less than 2, except for two stopbands at 3.3 to 3.75 GHz and 5.07 to 5.83 GHz for filtering the WiMAX and WLAN signals, respectively. It also demonstrates a nearly omnidirectional radiation pattern. The fabricated antenna has a tiny size, only 32 mm × 32 mm × 0.508 mm. The simulated results are compared with the measured performance and show good agreement. The simple structure, compact size, and good characteristics make the proposed antenna an excellent candidate for UWB applications.

Highlights

Ultrawideband (UWB) communication systems have gained a great deal of attention due to their high data transmission rates, low consumption, good security, and immunity to multipath fading
Ever since 2002 when the US Federal Communication Commission (FCC) authorized the unlicensed use of UWB in the frequency band from 3.1 to 10.6 GHz [1], a lot of research efforts have been put into UWB communication systems which led to a great demand of UWB antennas
The antenna impedance bandwidth extends from 2.4 to 12.5 GHz with VSWR less than 2, except for two stopbands at 3.3 to 3.75 GHz and 5.07 to 5.83 GHz. It covers the whole UWB spectrum defined by FCC, which confirms the proposed antenna’s good qualification for the UWB applications

Summary

A Compact CPW-Fed UWB Antenna with Dual Band-Notched Characteristics

The experimental and measured results show that the proposed antenna exhibits an impedance bandwidth over an ultrawideband frequency range from 2.4 to 12.5 GHz with VSWR less than 2, except for two stopbands at 3.3 to 3.75 GHz and 5.07 to 5.83 GHz for filtering the WiMAX and WLAN signals, respectively. It demonstrates a nearly omnidirectional radiation pattern. The simple structure, compact size, and good characteristics make the proposed antenna an excellent candidate for UWB applications

Introduction

Antenna Geometry

Experimental Results

Conclusions