A Study of the Effects of Symmetric and Asymmetric Design for CRLH-TL Unit Cell on XPD and Isolation for Dual Linear Polarized Antenna at Different Values of Phase Shifts

Madhukar Chandra (TU-chemnitz, Germany); Sadiq Kadhim Ahmed Ahmed (Mustansiriyah University, Iraq)

Dual linear polarization antennas with low cross polarization have been widely used for synthetic aperture radar application. This work presents a new design of a dual linear polarization patch antenna with low cross-polarization pattern and high isolation between two input ports. This work has two main objectives. The first is to generate different values of phase shifts using composite right left transmission line (CRLH-TL) metamaterial (symmetric and asymmetric configurations). The simulation reveals that the XPD of 34 dB and isolation of -30 dB at a phase shift of 40o. This method results in significant improvement in the XPD at the phase shift of 40o in comparison to the conventional antenna. The simulation, in this regard, reveals an improvement of 7 dB in principle planes. The second objective of this paper, a comparative study was made between the symmetric and asymmetric unit cells and their effects on the cross polarization patterns.

Journal: International journal of simulation: systems, science & technology V18

Published: Mar 31, 2017

DOI: 10.5013/IJSSST.a.18.01.01