A Low Switching-Loss W-Band Radiometer Utilizing a Single-Pole-Double-Throw Distributed Amplifier in 0.13-mu m SiGe BiCMOS

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This paper presents a low switching-loss Dicke radiometer for W-band passive imaging systems. The equivalent switching loss introduced by the passive single-pole-double-throw (SPDT) switch in the conventional radiometer is significantly reduced by the proposed single-pole-double-throw distributed amplifier (SPDT-DA), which leads to radical improvement on the receiver's noise performance. The Dicke radiometer consisting of a SPDT-DA, a four-stage low noise amplifier (LNA) and a power detector is fully integrated in a 0.13-mu m SiGe BiCMOS chip. With the 0.93-dB equivalent switching loss at 91 GHz of the SPDT-DA, the total noise figure (NF) of 8.4 dB at 91 GHz is achieved by the SPDT-DA followed by the LNA. With a power consumption of 28.5 mW, the radiometer obtains an overall RF gain of 42 dB and a noise equivalent temperature difference (NETD) of 0.21 K with 30-ms integration time. The two-dimensional imaging experiment with object distance of 0.7 m is successfully carried out with the radiometer chip.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2016-01
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.64, no.1, pp.226 - 238

ISSN
0018-9480
DOI
10.1109/TMTT.2015.2504499
URI
http://hdl.handle.net/10203/214543
Appears in Collection
EE-Journal Papers(저널논문)
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