On Wafer Noise Figure De-Embedding Method for CMOS Differential LNA

Maizan MUHAMAD  Norhayati SOIN  Harikrishnan RAMIAH  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E103-C   No.7   pp.335-340
Publication Date: 2020/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2019ECP5012
Type of Manuscript: PAPER
Category: Electronic Circuits
Keyword: 
on-wafer,  de-embedded structure,  noise figure,  low noise amplifier,  differential,  

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Summary: 
This paper presents on-wafer noise figure (NF) de-embedding method of differential low noise amplifier (LNA). The characterization of NF was set up and referred as multi-stage network. The Friis law was applied to improve from the noise contributions from the subsequent stages. The correlated differential NF is accurately obtained after de-embedding the noise contribution from the interconnections and external components. Details of equations and measurement procedure are reported in this work. A 2.4GHz differential LNA was tested to demonstrate the feasibility of measurement and showed precise NF compared with other methods. The result shows an NF of 0.57dB achieved using de-embedding method and 1.06dB obtained without the de-embedding method. This is an improvement of 0.49dB of NF measurement.