Windowing UWB microwave, mm-wave multi-port S-parameter measurements using open-ended excess electrical length

The Journal of Engineering

Mahmoud Kamarei¹  Gholamreza Askari¹ 

[1] School of Electrical and Computer Engineering, University College of Engineering, University of Tehran, North Kargar st., Tehran 14395-515, Iran

关键词: transmission S-parameter;    windowing UWB microwave multiport S-parameter measurement;    fast Fourier transform;    open-ended excess electrical length;    circuit verification;    time domain;    vector network analysers;    multiport measurements;    multiport ultrawideb;    mm-wave circuits;    UWB impulse radio;    multiport ultrawideb;    microwave circuits;    reflection S-parameter;    three-port UWB Wilkinson power divider;    mm-wave multiport S-parameter measurements;    frequency 22 GHz to 30 GHz;   

DOI  :  10.1049/joe.2017.0163

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Multi-port measurements are a big challenge in circuits' verification, especially when the frequency increases. This study presents a new technique for measuring S-parameters of multi-port ultra-wideband (UWB) microwave and mm-wave circuits. The concepts are based on direct or indirect applying modulated UWB impulse radio in desired bandwidth to the one port of the modified multi-port circuit and gathering the reflected signal in the same port and the output signal in the second port in time domain, and the other ports are left opened with a special designed added electrical length. Then by applying intelligent windowing in time domain to the gathering data, and using fast Fourier transform, the desired S-parameters are extracted. Validation of this technique is verified by design and fabrication of a three-port UWB Wilkinson power divider in 22–30 GHz. The simulation and measurement results of the reflection and transmission S-parameters by using this new technique are very close to those are extracted with the conventional vector network analysers S-parameters measurements and show the ability and the accuracy of this technique.

【 授权许可】

CC BY