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A Low Switching-Loss W-Band Radiometer Utilizing a Single-Pole-Double-Throw Distributed Amplifier in 0.13-mu m SiGe BiCMOS
- A Low Switching-Loss W-Band Radiometer Utilizing a Single-Pole-Double-Throw Distributed Amplifier in 0.13-mu m SiGe BiCMOS
- Bi, Xiaojun; Arasu, M. Annamalai.; Zhu, Yao; Je, Minkyu
- DGIST Authors
- Je, Minkyu
- Issue Date
- IEEE Transactions on Microwave Theory and Techniques, 64(1), 226-238
- Article Type
- Amplifiers (Electronic); BiCMOS; Broad-Band Amplifiers; Cascaded Noise Figure; Dicke Radiometers; Distributed Amplifier; Imaging Systems; Integration Time; Low Noise Amplifiers; Noise Equivalent Temperature Difference; Noise Figure; Noise Performance; Poles; Radiometers; Semiconducting Silicon; Silicon Alloys; Single-Pole Double-Throw (SPDT) Switch; Single Pole Double Throw; Sub-Terahertz Imaging; Switching; Transmission Line Loss; Two-Dimensional Imaging
- 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-μ 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. © 2015 IEEE.
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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