Dual-Band 4-Way Wilkinson Power Divider Based on Improved Simplified Composite Right and Left Handed Transmission Lines

In this paper, by using improved simplified composite right and left handed transmission lines (I-S-CRLH-TL), a novel 4-way parallel Wilkinson power divider (WPD) is presented. The proposed WPD exhibits the benefits of excellent isolation and equal power split between output ports in the dual frequency band. Also, the dual-band nature of this divider, low cost and easy integration with printed circuits and printed antennas in a compact size makes this device a very good candidate for feeding dual-band antennas and microwave devices. The proposed divider is designed and fabricated on a low cost substrate with permittivity of 4.4 and thickness of 0.79 mm to work at two arbitrary frequency bands of 0.95 GHz and 2.43 GHz. There is a good agreement between simulated and measured results in all cases. The design concept of this paper can be easily extended to another type of dual-band microwave components.