A BiCMOS W-Band 2x2 Focal-Plane Array With On-Chip Antenna

作者：Chen Zhiming^*; Wang Chun Cheng; Yao Hsin Cheng; Heydari Payam

来源：IEEE Journal of Solid-State Circuits, 2012, 47(10): 2355-2371.

DOI：10.1109/JSSC.2012.2209775

• Dicke radiometer
• direct conversion
• focal-plane array
• frequency generation
• LO distribution
• millimeter-wave
• on-chip antenna
• passive imaging
• SiGe
• W-band

This paper presents a W-band 2 x 2 focal-plane array (FPA) for passive millimeter-wave imaging in a standard 0.18 mu m SiGe BiCMOS process (f(T)/f(max) = 200/180 GHz). The FPA incorporates four Dicke-type receivers representing four imaging pixels. Each receiver employs the direct-conversion architecture consisting of an on-chip slot folded dipole antenna, an SPDT switch, a low noise amplifier, a single-balanced mixer, an injection-locked frequency tripler (ILFT), an IF variable gain amplifier, a power detector, an active bandpass filter and a synchronous demodulator. The LO signal is generated by a shared Ka-band PLL and distributed symmetrically to four local ILFTs. The measured LO phase noise is at 1 MHz offset from the 96 GHz carrier. This imaging receiver (without antenna) achieves a measured average responsivity and noise equivalent power of 285 MV/W and 8.1 fw/Hz(1/2), respectively, across the 86-106 GHz bandwidth, which results a calculated NETD of 0.48 K with a 30 ms integration time. The system NETD increases to 3 K with on-chip antenna due to its low efficiency at W-band. MMW images have been generated in transmission mode. This work demonstrates the highest integration level of any silicon-based systems in the 94 GHz imaging band.

• 出版日期2012-10
• 单位北京理工大学