基于人工传输线的小型微带Wilkinson功分器
Design of miniaturized microstrip Wilkinson power divider based on artificial transmission lines
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摘要: 提出了一种基于人工传输线的小型微带Wilkinson功分器，该器件使用由L-C元件构成的人工传输线取代传统传输线，并使用交指电容和贴片电阻进行端口隔离。设计制作的Wilkinson功分器中心频率为915 MHz的微带3 dB功分器，等幅同相地将输入功率分配到2个输出端口，尺寸仅有传统Wilkinson功分器的25%，端口幅度平衡度±0.2 dB，相位平衡度±1°。实验结果表明：功分器带宽为0.49～1.20 GHz，插入损耗小于3.2 dB，回波损耗大于10 dB，仿真结果和测量结果吻合较好。
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关键词:
- 人工传输线 /
- Wilkinson功分器 /
- 交指电容 /
- 小型化
Abstract: In this paper, a novel microstrip Wilkinson power divider based on artificial transmission lines is proposed. The design consists of recently proposed artificial transmission lines using L-C components instead of conventional microstrip transmission lines. Two interdigital capacitors and a chip resistor were applied to improve output port isolation. A power divider at 915 MHz was designed and fabricated. Compared with conventional Wilkinson power dividers, it features a size reduction of 75%. The bandwidth of the power divider is from 0.49 GHz to 1.2 GHz, the insertion loss is less than 3.2 dB, and the return loss is greater than 10.0 dB. Furthermore, the amplitude balance is within 0.2 dB and the phase balance is better than 1° in its operating band. Measured results show good consistent -
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