A novel fully planar quad band Wilkinson power divider

In this paper, by using extended composite right and left handed transmission line (E-CRLH-TL), the fully planar quad band Wilkinson power divider (WPD) proposed exhibits the benefits of bandwidth enlargement, excellent isolation and equal power split between output ports in the four pass-bands. The proposed divider is designed and fabricated on a low cost substrate with dielectric constant of 4.4 and a thickness of 0.8 mm as work at four arbitrary frequency bands of 2.4 GHz (ISM), 3.5 GHz (WiMax), 5.2 GHz (WiFi) and 5.8 GHz (WiFi). The results of the measured and simulated designs are in good agreement with each other which verifies the proposed design methodology. The design concept of this paper can be easily extended to various multi-band microwave devices.