An E-band, scalable 2×2 phased-array transceiver using high isolation injection locked oscillators in 90nm SiGe BiCMOS

Ebrahimi, Najme; Bagheri, Mahdi; Wu, Po-Yi; Buckwalter, James F.

doi:10.1109/rfic.2016.7508280

Cited by 6 publications

(1 citation statement)

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“…When an external signal is applied to an oscillator, if the injected signal is close to its own oscillation frequency, the frequency of the oscillator will shift towards the injected signal. When the injected signal amplitude is large enough, the output frequency of the oscillator will remain the same as the input signal frequency, while there is a phase difference between the phase of the output signal of the oscillator and the phase of the injected signal [3]. This phenomenon is widely used in communication systems, such as remote frequency calibration, antenna arrays, quadrature voltage-controlled oscillators (QVCOs), frequency dividers, frequency multipliers, clock recovery, etc.…”

Section: Introductionmentioning

confidence: 99%

A Weak Reverse Coupling Cascaded Injection-Locked VCO Array for Beam Scanning in Phased Arrays

et al. 2023

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We propose a novel phase shifter for beam scanning in phased arrays using a cascaded injection-locked voltage-controlled oscillator (VCO) array with weak reverse coupling. We analyze the phase noise performance of a multi-signal injection-locked oscillator and establish a phase output model for the array, studying the effects of forward and reverse injection ratios on phase and phase noise at each stage. By decoupling and cascade locking VCO array elements through controlled injection ratios, we design a 2.45 GHz one-dimensional linear array of four VCOs that achieves a continuous fixed phase difference between adjacent oscillators from −180∘ to 180∘, enabling electronic tuning of phase shift and beam scanning. Finally, the beam scanning of the antenna array is realized by using the VCO array. Our theoretical and experimental results demonstrate the effectiveness of our proposed approach.

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Section: Introductionmentioning

confidence: 99%