Low-insertion-loss planar four-way Gysel power divider with high isolation employing two-layer substrates

This paper presents a kind of novel planar four-way Gysel power divider that has high isolation and low insertion loss (IL). This power divider adopts twolayer substrates. The power divider circuit and isolation circuit are on different layers. For analysis and design, an equivalent circuit is given. The relationship between the impedance of the matching section and the working bandwidth is analyzed. The design process is given to illustrate a specific method that also applies to the N-way Gysel power divider. For verification, a prototype is designed, manufactured. The measured results show that IL is 6.3 +/- 0.1 dB approximately. The 20 dB relative isolation bandwidth achieves 45%. Between 1.88 and 2.64 GHz, the input return loss (RL) achieves 15 dB. And between 1.78 and 2.75 GHz, the output RL is better than 15 dB.

Automated summary

This paper presents a novel planar four-way Gysel power divider with high isolation and low insertion loss. The power divider utilizes two-layer substrates, with the divider circuit and isolation circuit on separate layers. An equivalent circuit is used for analysis and design, and the relationship between the impedance of the matching section and the working bandwidth is analyzed. A prototype is designed and manufactured for verification, with measured results showing good performance.