一种 D波段小型化定向耦合器芯片设计

基于GaAs 0.1 μm pHEMT工艺，设计了一款工作在 0.1~0.14 THz的小型化定向耦合器芯片。采用加载开路枝节线的方式提高传输线的等效电长度，进而实现电路结构的小型化；利用曲折线的方式构成开路枝节线，使得耦合器的物理尺寸进一步缩小。采用电磁仿真软件仿真表明，所设计的小型化定向耦合芯片中心工作频率为 0.12 THz，相对带宽大于 30%，带内的回波损耗高于 20 dB，带内插入损耗小于 1 dB，耦合度为( 10±0.5) dB，带内隔离度大于 20 dB，直通端口与耦合端口相位差为 90°±3.5°，其尺寸为0.21 mm×0.19 mm(不计 Pad尺寸)。

Abstract

Based on the 0.1 μm GaAs HEMT process, a miniature directional coupler chip operating in 0.1-0.14 THz is designed. The equivalent electric length of the transmission line is increased by loading the open branch to miniaturize circuit structure. The physical size of the coupler is further reduced by using the zigzag line，which is realized by the open branch and node line. Simulation results show that the designed miniaturized directional coupling chip has a center operating frequency of 0.13 THz, a relative bandwidth of more than 30%, an in-band echo loss of more than 20 dB, an in-band insertion loss of less than 1 dB, a coupling degree of (10±0.5) dB, a phase difference of (90°±3.5°), and a size of 0.21 mm× 0.19 mm(without pad).

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罗显虎, 程序, 张亮, 韩江安, 陈凤军, 夏鑫淋, 邓贤进. 一种 D波段小型化定向耦合器芯片设计[J]. 太赫兹科学与电子信息学报, 2019, 17(3): 353. LUO Xianhu, CHENG Xu, ZHANG Liang, HAN Jiang ’an, CHEN Fengjun, XIA Xinlin, DENG Xianjin. Design of on-chip D band miniaturized directional coupler[J]. Journal of terahertz science and electronic information technology, 2019, 17(3): 353.

一种 D波段小型化定向耦合器芯片设计

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