180/spl deg/out-of-phase power divider based on double-sided parallel striplines

A novel 180deg out-of-phase power divider based on double-sided parallel striplines (DSPSL) is proposed. The proposed power divider has a relative bandwidth of about 100%. The 180deg out-of-phase characteristic between the two output ports is frequency independent, which is suitable for various applications of wide bandwidth. In addition, the characteristic impedance of the transmission lines for the input and output is 50 Omega, and it allows easy integration with other microwave components. The proposed power divider has been demonstrated and verified. The experimental results are presented and show good performance