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A 4-element 60-GHz phased-array receiver employs transformer-based hybrid-mode mixing featuring high linearity and high gain. Closed-loop beam-forming calibration is achieved by sequentially performing gain equalization, I/Q calibration, and successive-approximation phase tuning. Implemented in 65nm CMOS, each element measures NF of 6.5dB, gain of 20dB and IP1dB of −12.5dBm. With the proposed beam-forming...
This paper presents a 4-path LO generation system with automatic phase tuning for 60 GHz phased-array receivers. Each path employs a linear phase-shift generation chain composed of an injection-locked-oscillator-based phase shifter cascaded with an injection-locked frequency tripler. The frequency tripler with a proposed locking-range enhancement technique is employed to relax both the frequency and...
Millimeter-Wave (MMW) phased-array receivers are used not only to overcome the large path loss and thus to relax the link budget but also to electrically steer the beam direction to suppress unwanted signals. Each element of the array requires a variable phase shift to compensate for the time difference between adjacent elements depending on the angle of the incident signals such that a maximum gain...
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