适用于MMIC的功率合成器设计

Design of a Power Combiner for MMIC

设计了一种适用于对MMIC功率放大器进行合成的新型功率合成器。采用多端口网络理论对功率合成结构进行分析,结合MMIC功放单片的工作特点总结出该功率合成器最重要的设计指标,设计出工作在5GHz^6GHz的16路辐射线型功率合成器。通过测试发现该功率合成器的驻波<1.5dB,各端口幅度不平衡度<±0.4dB,相位不平衡度<±2°,并具有较好的隔离度,整个功率合成器的直径小于56mm,非常适合用于C波段大功率的合成。最终采用该功率合成器在5GHz^6GHz的工作频率内成功获得160W的合成功率。

This paper shows a design of new power combiner used for combining MMIC power amplifiers. We analyzed the power combiner by N ports network theory, summarized the most important figures of a power combiner, based on the characteristics of the MMIC power amplifiers. And then developed a 16 way radial power combiner at 5GHz-6GHz which has the VSWRs 〈 1.5dB, the imbalance of the amplitude 〈 ± 0.4dB, as well as the phase 〈 ± 2° among the ports, a high isolations, and also has a small size of 56mm diameter. Finally we obtained 160W combining power using this combiner in the band of operating frequency 5GHz-6GHz.