Compact unequal Wilkinson power divider with large power dividing ratio

A compact unequal Wilkinson power divider with arbitrary power division is analyzed and demonstrated in this paper. The power divider can be designed with arbitrary power division in theory and achieves large power dividing ratio in practice. The proposed structure is compatible with single layer integration by using the normal PCB fabrication process. The complete analytical procedures of the proposed power divider are presented. To verify our proposed design approach in theory, one 11:1 unequal power divider is designed and fabricated. The measured bandwidth at 20 dB return losses is about 6%, while the isolation of the two output ports is better than 20 dB. Good agreement between the measured and simulated amplitude distributions is observed. The phase difference between outputs ports are about ±2.5 degree, over the 10% relative frequency bandwidth.