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A {\hbox {70}}{\hbox {\textendash }} {\hbox {78-}}{\hbox {GHz}} Integrated CMOS Frequency Synthesizer for W -Band Satellite Communications

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5 Author(s)
Xu, Z. ; Electr. Eng. Dept., Univ. of California at Los Angeles, Los Angeles, CA, USA ; Gu, Q.J. ; Yi-Cheng Wu ; Heng-Yu Jian
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A 70-78-GHz integrated frequency synthesizer is implemented in 65-nm CMOS. It has been integrated in a two-step zero-IF millimeter-wave transceiver for emerging applications, such as 81-86-GHz satellite communication, short-distance high-speed wireless link, as well as imaging and radar. The transceiver utilizes synthesizer voltage-controlled oscillator (VCO) output as the first LORF and 1/8 of LORF as the second LORF to cover the desired frequency band. The proposed synthesizer adopts integer-N architecture with 50-MHz reference. It also features coarse phase rotation to provide beam-forming capability for the intended transceiver. The synthesizer phase noise (PN) has been measured at 1/8 of the VCO frequency, about -102.2 dBc/Hz @ 1-MHz offset, and the measured reference spur for LORF is less than -49 dBc. Thus, the extrapolated PN performance is better than -84 dBc/Hz @ 1 MHz at 70-78 GHz LORF. The embedded frequency synthesizer occupies 0.16-mm2 chip area, including the angular rotator and buffers, and consumes 65 mW under 1-V supply.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:59 ,  Issue: 12 )