期刊
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
卷 65, 期 11, 页码 4703-4714出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2017.2707414
关键词
Beamforming; CMOS; complete 360 degrees phase shifter; 5G cellular communications; gate-drain capacitance cancellation; Ka-band; low insertion loss and rms phase error; low power; low-noise amplifier (LNA); millimeter-wave reflection-type phase shifter (RTPS); neutralization LNA; passive phase shifter; phased-array receiver (RX); pi-load; scalable arrays; switched transmission-line phase shifter
资金
- Center for Design of Analog-Digital Integrated Circuits
A low-power 28-GHz phased-array receiver (RX) front end is presented that incorporates a low-power low-noise amplifier (LNA) and a passive reflection-type phase shifter (RTPS) capable of 360 degrees phase shift with 5-b phase resolution and low gain variation. Passive phase shifters are limited by tradeoffs between phase resolution, insertion loss, and phase shift range. The proposed RTPS load design and optimization approach leads to a 28-GHz RTPS achieving the state-of-the-art insertion loss with 360 degrees phase shift range and low loss variation across the phase shift. The LNA adopts a transformer-coupled neutralization architecture that increases available gain, enabling lower power consumption. The phase-darray front end is designed for Ka-band applications and has been implemented in 65-nm CMOS. The measured RTPS achieves 360 degrees phase shift with 7.75 +/- 0.3 dB insertion loss and an rms phase error of 0.3 degrees at 28 GHz. The low-power phased-array RX front end has an overall gain of 9.5 +/- 0.4 dB and noise figure < 5.5 dB at 28 GHz. The RX front end consumes 10 mW from a 0.9-V supply with phase shifter and an LNA active area of 0.16 and 0.32 mm(2), respectively, in 65-nm CMOS, demonstrating its suitability for low-power phased-array RX for emerging wireless links.
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