A new miniature ultra wide band planar microstrip antenna based on the metamaterial transmission line

Abstract

In this article, a simple and miniature ultra wide band (UWB) printed planar antenna with excellent radiate characteristics is presented. A method to reduce the size and enlarge the bandwidth of Metamaterial (MTM) antennas utilizing a composite right/left handed transmission line (CRLH-TL) is suggested. We proposed an efficient way to foot print area reduction and extend the bandwidth accompanying improvement the gain and the efficiency of metamaterial antennas, which has been examined by full-wave simulation. Compact size, UWB, low cost, high gain, unidirectional radiation patterns and fitting impedance characteristics are the chief advantages of the suggested antenna, which are obtained by proposed method. The antenna has a compact size of 12.2mm × 9.2mm × 1.6mm or 0.08λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.06λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.01λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> (λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> : the free space wavelength at 2GHz), and provides the impedance bandwidth about 140% between 1.2 and 6.8GHz for VSWR <; 2 and also the peak gain and the maximum efficiency are 7.28dBi and 92.3%, respectively, at 5.2GHz. The suggested method can be utilized to design new miniature and UWB metamaterial antennas and microwave components for mobile handset implementations.