A 270-to-300 GHz LO-Path Phase Shifting Architecture for Sub-mm-wave Phased Arrays

Iskandar, Zyad; Siligaris, Alexandre; Lugo-Alvarez, Jose; Pistono, Emmanuel; Ferrari, Philippe

doi:10.23919/eumc.2018.8541650

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…One of the additional time scales is slow because it is associated with the noise perturbations. The other one is faster, and depends on the P value selected in (6), which determines the bandwidth about each spectral line in the Fourier-series representation of the circuit variables. Two cases will be considered here, P = N, for which the harmonic components of the Fourier series considered in (6) take constant values, and P < N for which the harmonic components are time-varying.…”

Section: Phase Noisementioning

confidence: 99%

“…The other one is faster, and depends on the P value selected in (6), which determines the bandwidth about each spectral line in the Fourier-series representation of the circuit variables. Two cases will be considered here, P = N, for which the harmonic components of the Fourier series considered in (6) take constant values, and P < N for which the harmonic components are time-varying. The case P = N will be addressed by means of a two-tier HB analysis, with the admittance function of the injection-locked oscillator at f o = Nf in constituting the outer tier.…”

Section: Phase Noisementioning

confidence: 99%

“…The recent works [1][2][3][4][5][6][7] have demonstrated a novel frequency-synthesis methodology, based on the high-order sub-harmonic injection-locking of a high-frequency oscillator, at a frequency f o , by an independent source at a much lower frequency f in . In [1][2][3], the high ratio N between the two frequencies (in the order of N = 30) is achieved by shaping the input sinusoidal signal into a square signal that periodically switches on and off a high-frequency oscillator.…”

Section: Introductionmentioning

confidence: 99%

“…Successful experimental demonstrations of this promising frequency-synthesis method, as well as several extensions of the new procedure, have been presented in [1][2][3][4][5][6][7]. However, the realistic simulation of the high-order sub-harmonic injection-locked oscillator, required for an accurate prediction of its behavior, is involved.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of high-order sub-harmonically injection-locked oscillators

Hernandez

Pontón

Sancho

et al. 2020

Int. J. Microw. Wireless Technol.

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High-order sub-harmonically injection-locked oscillators have recently been proposed for low phase-noise frequency generation, with carrier-selection capabilities. Though excellent experimental behavior has been demonstrated, the analysis/simulation of these circuits is demanding, due to the high ratio between the oscillation frequency and the frequency of the input source. This work provides an analysis methodology that covers the main aspects of the circuit behavior, including the detection of the locking bands and the prediction of the phase-noise spectral density. Initially, the oscillator in the presence of a multi-harmonic input source is described with a reduced-order envelope-domain formulation, at the oscillation frequency, based on an oscillator-admittance function extracted from harmonic-balance simulations. This allows deriving an expression for the oscillation phase shift with respect to the input source, and the average of this phase shift is shown to evolve continuously in the distinct synchronization bands obtained when varying a tuning voltage. This property can be used to detect the locking bands in circuit-level envelope-domain simulations, which, as shown here, can be done through different Fourier decompositions and sampling rates. The phase noise of the high-order sub-harmonic injection-locked oscillator under an arbitrary periodic input waveform is investigated in detail. The frequency response to the noise sources is described with a semi-analytical formulation, relying on the oscillator-admittance function in injection-locked conditions. The input noise is derived from the timing jitter of the injection source and the phase-noise response is shown to exhibit a low-pass characteristic, which initially follows the up-converted input noise and then the oscillator own noise sources. A method is proposed to identify the key parameters of the derived phase-noise spectrum from envelope-domain simulations. The various analysis methodologies have been applied to a prototype at 2.7 GHz at the sub-harmonic order N = 30 which has been manufactured and measured.

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Section: Phase Noisementioning

confidence: 99%

Section: Phase Noisementioning

confidence: 99%