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Design of the quasi-0 dB backward wave-coupled line coupler using CRLH-TL based on stepped-impedance open stub-loaded dual-mode resonator
Journal of Electromagnetic Waves and Applications ( IF 1.3 ) Pub Date : 2020-05-02 , DOI: 10.1080/09205071.2020.1758221
Abhishek Kumar 1 , Dileep Kumar Upadhyay 1 , Srikanta Pal 1
Affiliation  

ABSTRACT This paper demonstrates symmetric backward wave quasi-0 dB coupled line coupler (CLC) based on the globe shaped composite right/left-handed transmission line (GS-CRLH-TL). The proposed CLC shows quasi-0 dB backward wave coupling with measured maximum backward coupling level of −0.72 dB at 3.07 GHz. −3 dB bandwidth of the backward coupling region is from 2.75 GHz to 3.34 GHz, corresponding to fractional bandwidth (FBW) of 19.16%. The designed CLC shows good isolation of more than 43 dB in the backward coupling region in −3 dB frequency range from 2.75 GHz to 3.34 GHz. The measured value of return loss, at the center frequency 3.07 GHz, is more than 26.4 dB. Overall size of the fabricated CLC including 50 Ω feedline is 0.631λg × 0.455λg where λg is the guided wavelength at 3.07 GHz. Good concurrence is obtained between the simulated results, equivalent LC circuit model results and the measured results.

中文翻译:

基于阶跃阻抗开路短截线负载双模谐振器的CRLH-TL准0dB反向波耦合线耦合器设计

摘要 本文展示了基于球形复合右/左手传输线 (GS-CRLH-TL) 的对称反向波准 0 dB 耦合线耦合器 (CLC)。建议的 CLC 显示准 0 dB 反向波耦合,在 3.07 GHz 处测得的最大反向耦合电平为 -0.72 dB。后向耦合区域的−3 dB 带宽为 2.75 GHz 至 3.34 GHz,对应于 19.16% 的分数带宽 (FBW)。设计的 CLC 在 2.75 GHz 至 3.34 GHz 的 -3 dB 频率范围内的后向耦合区域显示出超过 43 dB 的良好隔离。在中心频率 3.07 GHz 处,回波损耗的测量值大于 26.4 dB。包括 50 Ω 馈线的制造 CLC 的总体尺寸为 0.631λg × 0.455λg,其中 λg 是 3.07 GHz 的引导波长。模拟结果之间获得了良好的一致性,
更新日期:2020-05-02
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