Miniaturized Broadband Microwave Permittivity Sensing for Biomedical Applications

Journal article (2019)

Authors

G. Vlachogiannakis Electronics -

Z. Hu Electronics - , HiSilicon Technologies Co.

H. Thippur Shivamurthy Electronics -

A. Neto Tera-Hertz Sensing -

M.A.P. Pertijs Electronic Instrumentation -

L.C.N. de Vreede Electronics -

M. Spirito Electronics -

Research Group

Tera-Hertz Sensing () (TU Delft)

Microwave sensors Complex permittivity measurement Bridge circuits Biomedical sensors Complementary metal-oxide semiconductor (CMOS) sensors

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http://resolver.tudelft.nl/uuid:fa6b9aa5-9137-4639-9d4a-bf1b07a2b5dd

Published Date

2019

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

We present a compact, scalable, and broadband architecture for the implementation of complex microwave permittivity sensors in complementary metal-oxide semiconductor (CMOS) technology. The proposed architecture consists of a patch sensor embedded in a programmable balanced readout bridge and performs third and fifth harmonic downconversion for fast multi-frequency readout. Circuits designed can act as the basic building block for a wide span of biomedical applications, ranging from wearables to permittivity imaging. Experimental results of manufactured prototypes demonstrate measurement noise reduction through bridge balancing, Debye model parameter estimation of independent material with a 1.6% error using full frequency dataset, and 5.3% in high energy efficiency mode, as well as image construction based on material permittivity differences.

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