A small signal coupling model for predicting the coupling between LNAs

Junyu Shi; Dasheng Cui; Yuming Wu

doi:10.1088/1674-4926/38/7/075002

A small signal coupling model for predicting the coupling between LNAs

Junyu Shi^*, Dasheng Cui, Yuming Wu

^*Corresponding author for this work

School of Integrated Circuits and Electronics

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

A small signal coupling model is developed to analyze the coupling between two LNAs. The mutual inductance between the adjacent on-chip inductors is considered responsible for this coupling. A set of formulas have been derived to quantitatively predict the coupling effects. Based on our analysis, a quick estimation can be made to see which pair of inductors plays a key role in evaluating the coupling between the LNAs. Source inductors of two LNAs are placed closely while the load inductors are far apart according to the analysis. To validate the proposed theory, two 2 GHz LNAs are fabricated. The LNAs have a peak gain of 18 dB and NF of 1.4 dB. The coupling between the LNAs is -30 dB.

Original language	English
Article number	075002
Journal	Journal of Semiconductors
Volume	38
Issue number	7
DOIs	https://doi.org/10.1088/1674-4926/38/7/075002
Publication status	Published - Jul 2017

Keywords

Coupling
Low noise amplifier (LNA)
On-chip inductors
Small signal model

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10.1088/1674-4926/38/7/075002

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title = "A small signal coupling model for predicting the coupling between LNAs",

abstract = "A small signal coupling model is developed to analyze the coupling between two LNAs. The mutual inductance between the adjacent on-chip inductors is considered responsible for this coupling. A set of formulas have been derived to quantitatively predict the coupling effects. Based on our analysis, a quick estimation can be made to see which pair of inductors plays a key role in evaluating the coupling between the LNAs. Source inductors of two LNAs are placed closely while the load inductors are far apart according to the analysis. To validate the proposed theory, two 2 GHz LNAs are fabricated. The LNAs have a peak gain of 18 dB and NF of 1.4 dB. The coupling between the LNAs is -30 dB.",

keywords = "Coupling, Low noise amplifier (LNA), On-chip inductors, Small signal model",

author = "Junyu Shi and Dasheng Cui and Yuming Wu",

note = "Publisher Copyright: {\textcopyright} 2017 Chinese Institute of Electronics.",

year = "2017",

month = jul,

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language = "English",

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T1 - A small signal coupling model for predicting the coupling between LNAs

AU - Shi, Junyu

AU - Cui, Dasheng

AU - Wu, Yuming

PY - 2017/7

Y1 - 2017/7

N2 - A small signal coupling model is developed to analyze the coupling between two LNAs. The mutual inductance between the adjacent on-chip inductors is considered responsible for this coupling. A set of formulas have been derived to quantitatively predict the coupling effects. Based on our analysis, a quick estimation can be made to see which pair of inductors plays a key role in evaluating the coupling between the LNAs. Source inductors of two LNAs are placed closely while the load inductors are far apart according to the analysis. To validate the proposed theory, two 2 GHz LNAs are fabricated. The LNAs have a peak gain of 18 dB and NF of 1.4 dB. The coupling between the LNAs is -30 dB.

AB - A small signal coupling model is developed to analyze the coupling between two LNAs. The mutual inductance between the adjacent on-chip inductors is considered responsible for this coupling. A set of formulas have been derived to quantitatively predict the coupling effects. Based on our analysis, a quick estimation can be made to see which pair of inductors plays a key role in evaluating the coupling between the LNAs. Source inductors of two LNAs are placed closely while the load inductors are far apart according to the analysis. To validate the proposed theory, two 2 GHz LNAs are fabricated. The LNAs have a peak gain of 18 dB and NF of 1.4 dB. The coupling between the LNAs is -30 dB.

KW - Coupling

KW - Low noise amplifier (LNA)

KW - On-chip inductors

KW - Small signal model

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VL - 38

JO - Journal of Semiconductors

JF - Journal of Semiconductors

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ER -

A small signal coupling model for predicting the coupling between LNAs

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