Miniaturized Power Divider Based on Parallel Coupled Microstrip Lines

This paper proposes a miniaturized power divider circuit using parallel coupled lines. As compared to the traditional Wilkinson power divider circuit, this designed power divider applied the coupling effect of the parallel lines into the power divider response synthesis. Simultaneously, capacitive branch loading technology and multi-stage cascade technology are adopted to effectively improve the miniaturization and bandwidth of this power divider. The miniaturized power divider utilizes parallel coupling lines to replace the 1/4λ impedance converter of the conventional Wilkinson power divider, and open circuit branches are loaded at both ends of the coupling line. The measured and simulated results are depicted in this paper as well. The proposed power divider resonates at 2GHz with S
11
less than 10dB while the insertion loss is 3.2dB within the working frequency band from 0.96GHz to 2.45GHz. The dimension of the fabricated power divider is 29.06mm × 26.6mm. Therefore, this power divider achieves miniaturization of the circuit while ensuring its performance.