Three-way out-of-phase power divider

For the first time, a novel three-way out-of-phase power divider designed based on the double-sided parallel-strip line (DSPSL), is proposed. The outputs provide one in-phase port and two out-of-phase, which are largely insensitive to frequency variations over a broad bandwidth. The total length of the circuit is half a wavelength. The design procedure of the power divider is given. Experimental results show that the power divider can achieve good matching, high isolation, balanced amplitude, and an approximately constant phase difference from 1 to 2.6 GHz.