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An automatic gain and offset control circuit for DC-Coupled continuous-wave radar systems
Publikationstyp
Conference Paper
Date Issued
2020-08
Sprache
English
Volume
2020-August
Start Page
980
End Page
983
Article Number
9223859
Citation
IEEE MTT-S International Microwave Symposium (2020)
Contribution to Conference
Publisher DOI
Scopus ID
This publication addresses the problem of offsets and offset drifts in continuous-wave radar systems and presents a compensation circuit as hardware solution. In the first part, the sources of static offsets in the baseband voltages are identified and quantified by using an exemplary six-port based radar system. To solve the problem, an offset control circuit is introduced and the benefit, a better use of the analog-to-digital-converter's inputs leading to a reduction of quantization noise, is derived in theory and validated by measurement. The compensation circuit is digitally controlled by a microcontroller and can be used in any six-port or mixer-based radar system.
Subjects
Automatic gain control
Continuous-wave radar
Offset compensation
Six-port radar
Vital parameter sensing