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A CMOS fully differential W-band passive imager with <2 K NETD

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4 Author(s)
Qun Jane Gu ; University of Florida, Gainesville, USA ; Zhiwei Xu ; Heng-Yu Jian ; Mau-Chung Frank Chang

This paper presents a fully differential W-band passive imager that integrates LNA, Dicke switch, detector and filter, with minimum NEPs of 21 fW/√Hz / 24 fW/√Hz for without/with switch cases and a peak responsivity of >;1.8 MV/W. To authors' knowledge, this represents the largest responsivity to date from a CMOS radiometer chip. It achieves NETD = 1.94 K with 30ms integration time. The chip occupies 0.49 mm2 active area with 57 mW power consumption.

Published in:

2011 IEEE Radio Frequency Integrated Circuits Symposium

Date of Conference:

5-7 June 2011