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A 77-GHz Phased-Array Transceiver With On-Chip Antennas in Silicon: Receiver and Antennas

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5 Author(s)
Aydin Babakhani ; California Inst. of Technol., Pasadena, CA ; Xiang Guan ; Abbas Komijani ; Arun Natarajan
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In this paper, we present the receiver and the on-chip antenna sections of a fully integrated 77-GHz four-element phased-array transceiver with on-chip antennas in silicon. The receiver section of the chip includes the complete down-conversion path comprising low-noise amplifier (LNA), frequency synthesizer, phase rotators, combining amplifiers, and on-chip dipole antennas. The signal combining is performed using a novel distributed active combining amplifier at an IF of 26 GHz. In the LO path, the output of the 52-GHz VCO is routed to different elements and can be phase shifted locally by the phase rotators. A silicon lens on the backside is used to reduce the loss due to the surface-wave power of the silicon substrate. Our measurements show a single-element LNA gain of 23 dB and a noise figure of 6.0dB. Each of the four receive paths has a gain of 37 dB and a noise figure of 8.0 dB. Each on-chip antenna has a gain of +2 dBi

Published in:

IEEE Journal of Solid-State Circuits  (Volume:41 ,  Issue: 12 )