A 180/spl deg/ out-of-phase power divider using asymmetrical coplanar stripline

This letter presents a new uniplanar 3-dB power divider using an asymmetrical coplanar stripline (ACPS) for microwave integrated circuit (MIC) and microwave and millimeter-wave integrated circuit (MMIC) applications. The circuit having 180/spl deg/ out-of-phase between two output ports provides good performance as compared to conventional microstrip power dividers. Experimental results for the power divider show an amplitude imbalance of 0.4 dB and a phase difference of 180/spl deg//spl plusmn/1/spl deg/ over a wide bandwidth from 2.5 to 3.5 GHz.