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Four-hundred gigahertz broadband multi-branch waveguide coupler
IET Microwaves, Antennas & Propagation ( IF 1.1 ) Pub Date : 2020-08-31 , DOI: 10.1049/iet-map.2020.0090
Bo Zhang 1 , Zhongqian Niu 1 , Jiale Wang 2 , Dongfeng Ji 1 , Tianchi Zhou 1 , Yang Liu 1 , Yinian Feng 1 , Yi Hu 1 , Jicong Zhang 1 , Yong Fan 1
Affiliation  

Terahertz technology is a hotspot in the current academic research. In this study, a 400 GHz broadband multi-branch waveguide hybrid coupler is designed, but it is very difficult to fabricate. In order to release the processing difficulty, a modified five-branch hybrid coupler has also been designed, fabricated and measured. The hybrid coupler consists of five modified branches and has been optimised to a great performance, which increases the operation bandwidth. Compared to the traditional five-branch hybrid coupler design, this structure has a wider operation bandwidth and the bandwidth is almost the same as traditional seven-branch hybrid coupler. Based on this model, the performance of the coupler is optimised by HFSS software. The measurement results show good performance that >18 dB return loss ( S 11 ) and isolation ( S 23 ), 90° ± 2° phase difference and 0.3 dB amplitude imbalance are obtained in the frequency range of 380–460 GHz, agreeing well with the simulation results.

中文翻译:

四百兆赫兹宽带多分支波导耦合器

太赫兹技术是当前学术研究的热点。在这项研究中,设计了一个400 GHz宽带多分支波导混合耦合器,但是很难制造。为了消除加工困难,还设计,制造和测量了改进的五分支混合耦合器。混合耦合器由五个修改的分支组成,并且已经过优化以实现出色的性能,从而增加了操作带宽。与传统的五分支混合耦合器设计相比,该结构具有更宽的工作带宽,带宽几乎与传统的七分支混合耦合器相同。基于此模型,可通过HFSS软件优化耦合器的性能。测量结果表明,回波损耗> 18 dB( 小号 11 )和隔离( 小号 23 ),在380–460 GHz的频率范围内获得90°±2°的相位差和0.3 dB的幅度失衡,与仿真结果非常吻合。
更新日期:2020-09-01
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