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首页> 外文期刊>Microwave and optical technology letters >COMPACT CMOS BRANCH-LINE COUPLER USING HIGH-Q SLOW-WAVE TRANSMISSION LINES
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COMPACT CMOS BRANCH-LINE COUPLER USING HIGH-Q SLOW-WAVE TRANSMISSION LINES

机译:使用高Q慢波传输线的紧凑型CMOS分枝线耦合器

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摘要

This article presents a miniaturized 90° coupler incorporating slotted conductor-backed coplanar waveguide (S-CBCPW) transmission lines (TLs) and four shunt capacitors. The periodically slotted ground achieves higher slow-wave factor (SWF) or effective permittivity (ε_(eff)), and lower attenuation constant. Electrical characteristics of the SCBCPW TLs are investigated by different slotted ground layers. Moreover, trade-offs among SWF, characteristic impedance, and electrical length for the design are also discussed. Finally, the measured 24-GHz coupler not only features smallest normalized chip area among previously reported CMOS couplers but also demonstrates excellent results which are comparable to the designs at 60 GHz.
机译:本文介绍了一种小型化的90°耦合器,其中包括开槽的导体支持的共面波导(S-CBCPW)传输线(TL)和四个并联电容器。周期性开槽的地面可获得较高的慢波系数(SWF)或有效介电常数(ε_(eff)),以及较低的衰减常数。 SCBCPW TL的电气特性通过不同的开槽接地层进行研究。此外,还讨论了SWF,特性阻抗和电气长度之间的权衡。最后,所测得的24 GHz耦合器不仅具有先前报道的CMOS耦合器中最小的归一化芯片面积,而且还具有可与60 GHz设计媲美的出色结果。

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