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A 44–46-GHz 16-Element SiGe BiCMOS High-Linearity Transmit/Receive Phased Array

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3 Author(s)
Choul-Young Kim ; Chungnam National University, Korea ; Dong-Woo Kang ; Gabriel M. Rebeiz

This paper presents a 16-element Q-band transmit/ receive phased array with high receive linearity and low power consumption. The design is based on the all-RF architecture with passive phase shifters and a 1:16 Wilkinson network. An input P1dB from -9 to -10 dBm and a noise figure of 10-11.5 dB at 44-46 GHz is achieved in the receive mode with a power consumption of 0.95 W. In the transmit mode, each channel has an output P1dB of 3-2 dBm and Psat of 6-4 dBm at 44-46 GHz with a power consumption of 1.16 W. The design results in a low root mean square (rms) gain error due to a high-resolution variable gain amplifier in each channel. Measurements on multiple channels show near-identical gain and phase response in both the transmit and receive mode due to the use of a symmetrical passive combiner. The measured on-chip coupling is <; -40 dB and results in insignificant additional rms and phase error.

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:60 ,  Issue: 3 )