NEWS
5-18 GHz Wide Band Coverage Quadrature Wireless Receiver
发布时间：2025-01-20
The research team has proposed an ultra-wideband low-noise reconfigurable RF receiver capable of application in the 6G communication band. In conventional receiver architectures, a common transconductance unit is usually used to drive the mixers of the two I-Q channels, which makes it necessary to use a non-interleaved clock with a 25% duty cycle for downconversion, and the generation of non-interleaved clocks for high-frequency applications is difficult; meanwhile, non-ideal clock interleaving worsens the I-Q mismatch of the receiver output. To address this problem, the research team proposes a quadrature downconversion receiver structure with improved I-Q channel isolation, which prevents the feedthrough between I-Q paths by introducing an independent transconductance unit circuit in the I-Q paths, and simplifies the design of the clock generation circuitry by enabling the receiver to use a 50% duty cycle clock for downconversion. In addition, in order to improve the linearity of the analog baseband circuitry, the receiver introduces a passive filter into the analog baseband circuitry, which reduces power consumption while improving the overall receiver linearity.
Fabricated on a 28nm CMOS process, the receiver achieves 5-18GHz band coverage, 100-500MHz continuously adjustable baseband bandwidth, 40dB gain adjustable range, and 2.1-5.4dB noise figure at 104-199mW power consumption.
The receiver chip was developed by Xu Hao, a young researcher at the School of Microelectronics, Fudan University, and PhD students Junyan Bi, Tenghao Zou, and Weitao He, and the related results were published in the top conference on integrated circuits, 2024 ISSCC, and the top journal, 2024 JSSC.
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