Miniature <inline-formula> <tex-math notation="LaTeX">$V$</tex-math> </inline-formula>-Band Rat-Race Coupler in CMOS Using Cascaded Bridged-T Coils

Yo Shen Lin; Pei Shan Lu; Chun Yi Lu

doi:10.1109/TMTT.2022.3222239

Miniature <inline-formula> <tex-math notation="LaTeX">$V$</tex-math> </inline-formula>-Band Rat-Race Coupler in CMOS Using Cascaded Bridged-T Coils

Yo Shen Lin, Pei Shan Lu, Chun Yi Lu

電機工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

1 引文斯高帕斯（Scopus）

摘要

In this article, the design of a miniature <inline-formula> <tex-math notation="LaTeX">$V$</tex-math> </inline-formula>-band rat-race coupler in CMOS is presented. Through the employment of cascaded bridged-T coils in place of transmission line sections in conventional designs, a very compact circuit layout can be achieved through meandering the cascaded bridged-T coils. Also, in order to properly characterize the bridged-T coil design in CMOS, a new model extraction technique for lossy bridged-T coils is developed. The proposed model extraction technique is based on analytic equations only, and it can consider the frequency-dependent conductor and dielectric losses associated with a lossy bridged-T coil. With the aid of the proposed model extraction technique, a miniature <inline-formula> <tex-math notation="LaTeX">$V$</tex-math> </inline-formula>-band rat-race coupler is realized using a commercial 0.18-<inline-formula> <tex-math notation="LaTeX">$\mu $</tex-math> </inline-formula>m CMOS process. It features a circuit size of only 312 <inline-formula> <tex-math notation="LaTeX">$\mu $</tex-math> </inline-formula>m <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math> </inline-formula> 234 <inline-formula> <tex-math notation="LaTeX">$\mu $</tex-math> </inline-formula>m, which corresponds to an electrical size of 0.062<inline-formula> <tex-math notation="LaTeX">$\lambda _{0} $</tex-math> </inline-formula> <inline-formula> <tex-math notation="LaTeX">$\times $</tex-math> </inline-formula> 0.047<inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$</tex-math> </inline-formula> at 60 GHz. Good measured performance is obtained, and the measured bandwidth defined under an amplitude imbalance within 1.1 dB, a phase error within 5<inline-formula> <tex-math notation="LaTeX">$^{\circ}$</tex-math> </inline-formula>, a return loss better than 15 dB, and an isolation better than 20 dB is from 55.2 to 60.9 GHz or 9.82%.

原文	???core.languages.en_GB???
頁（從 - 到）	1-13
頁數	13
期刊	IEEE Transactions on Microwave Theory and Techniques
DOIs	https://doi.org/10.1109/TMTT.2022.3222239
出版狀態	已被接受 - 2022

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10.1109/TMTT.2022.3222239

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@article{c83e4cc29ced45bab017d2ae84380226,

title = "Miniature $V$ -Band Rat-Race Coupler in CMOS Using Cascaded Bridged-T Coils",

abstract = "In this article, the design of a miniature $V$ -band rat-race coupler in CMOS is presented. Through the employment of cascaded bridged-T coils in place of transmission line sections in conventional designs, a very compact circuit layout can be achieved through meandering the cascaded bridged-T coils. Also, in order to properly characterize the bridged-T coil design in CMOS, a new model extraction technique for lossy bridged-T coils is developed. The proposed model extraction technique is based on analytic equations only, and it can consider the frequency-dependent conductor and dielectric losses associated with a lossy bridged-T coil. With the aid of the proposed model extraction technique, a miniature $V$ -band rat-race coupler is realized using a commercial 0.18- $\mu $ m CMOS process. It features a circuit size of only 312 $\mu $ m $\times$ 234 $\mu $ m, which corresponds to an electrical size of 0.062 $\lambda _{0} $ $\times $ 0.047 $\lambda _{0}$ at 60 GHz. Good measured performance is obtained, and the measured bandwidth defined under an amplitude imbalance within 1.1 dB, a phase error within 5 $^{\circ}$ , a return loss better than 15 dB, and an isolation better than 20 dB is from 55.2 to 60.9 GHz or 9.82%.",

keywords = "Bridged-T coil, CMOS, Coils, Couplers, Integrated circuit modeling, Mathematical models, Microwave circuits, Millimeter wave technology, model extraction, rat-race coupler, Semiconductor device modeling",

author = "Lin, {Yo Shen} and Lu, {Pei Shan} and Lu, {Chun Yi}",

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year = "2022",

doi = "10.1109/TMTT.2022.3222239",

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journal = "IEEE Transactions on Microwave Theory and Techniques",

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T1 - Miniature $V$ -Band Rat-Race Coupler in CMOS Using Cascaded Bridged-T Coils

AU - Lin, Yo Shen

AU - Lu, Pei Shan

AU - Lu, Chun Yi

N1 - Publisher Copyright: IEEE

PY - 2022

Y1 - 2022

N2 - In this article, the design of a miniature $V$ -band rat-race coupler in CMOS is presented. Through the employment of cascaded bridged-T coils in place of transmission line sections in conventional designs, a very compact circuit layout can be achieved through meandering the cascaded bridged-T coils. Also, in order to properly characterize the bridged-T coil design in CMOS, a new model extraction technique for lossy bridged-T coils is developed. The proposed model extraction technique is based on analytic equations only, and it can consider the frequency-dependent conductor and dielectric losses associated with a lossy bridged-T coil. With the aid of the proposed model extraction technique, a miniature $V$ -band rat-race coupler is realized using a commercial 0.18- $\mu $ m CMOS process. It features a circuit size of only 312 $\mu $ m $\times$ 234 $\mu $ m, which corresponds to an electrical size of 0.062 $\lambda _{0} $ $\times $ 0.047 $\lambda _{0}$ at 60 GHz. Good measured performance is obtained, and the measured bandwidth defined under an amplitude imbalance within 1.1 dB, a phase error within 5 $^{\circ}$ , a return loss better than 15 dB, and an isolation better than 20 dB is from 55.2 to 60.9 GHz or 9.82%.

AB - In this article, the design of a miniature $V$ -band rat-race coupler in CMOS is presented. Through the employment of cascaded bridged-T coils in place of transmission line sections in conventional designs, a very compact circuit layout can be achieved through meandering the cascaded bridged-T coils. Also, in order to properly characterize the bridged-T coil design in CMOS, a new model extraction technique for lossy bridged-T coils is developed. The proposed model extraction technique is based on analytic equations only, and it can consider the frequency-dependent conductor and dielectric losses associated with a lossy bridged-T coil. With the aid of the proposed model extraction technique, a miniature $V$ -band rat-race coupler is realized using a commercial 0.18- $\mu $ m CMOS process. It features a circuit size of only 312 $\mu $ m $\times$ 234 $\mu $ m, which corresponds to an electrical size of 0.062 $\lambda _{0} $ $\times $ 0.047 $\lambda _{0}$ at 60 GHz. Good measured performance is obtained, and the measured bandwidth defined under an amplitude imbalance within 1.1 dB, a phase error within 5 $^{\circ}$ , a return loss better than 15 dB, and an isolation better than 20 dB is from 55.2 to 60.9 GHz or 9.82%.

KW - Bridged-T coil

KW - CMOS

KW - Coils

KW - Couplers

KW - Integrated circuit modeling

KW - Mathematical models

KW - Microwave circuits

KW - Millimeter wave technology

KW - model extraction

KW - rat-race coupler

KW - Semiconductor device modeling

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U2 - 10.1109/TMTT.2022.3222239

DO - 10.1109/TMTT.2022.3222239

M3 - 期刊論文

AN - SCOPUS:85144061321

SN - 0018-9480

SP - 1

EP - 13

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

ER -

Miniature <inline-formula> <tex-math notation="LaTeX">$V$</tex-math> </inline-formula>-Band Rat-Race Coupler in CMOS Using Cascaded Bridged-T Coils

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