Metamaterial CSRR Loaded T-Junction Phase Shifting Power Divider Operating at 2.4 GHz

Abstract

A power divider T-network requires dissimilar lengths of the two output branches if a phase difference is desired between the two output ports. This often leads to an asymmetrical structure of the power divider. In this paper, a phase difference between the two output ports of a power divider is achieved with the help of a complementary split-ring resonator (CSRR) structure. The T-junction divider is a three-port network. The middle port is fed by a 50 Ω microstrip line, and the other two ports are considered as an output port. A CSRR is etched from the ground plane below one of the output branches. It is observed that by adjusting the position of the CSRR structure in a company with a microstrip line, it is possible to modify the phase variation between output branches and this divider additionally having less power loss characteristics. A design prototype is fabricated in an FR4 substrate and tested at a frequency 2.4 GHz for a phase modification of about 45°. The proposed power divider is compact and simple in design and less power losses so it is easily integrated with microstrip antennas and convenient for phased array antenna design.