Balanced monolithic oscillators at K- and Ka-band

Ang, Kian Siong; Underhill, M.J.; Robertson, I.D.

doi:10.1109/22.821758

Cited by 34 publications

(2 citation statements)

References 13 publications

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“…Differential oscillator has been widely developed because it is can be directly fed into some balanced microwave components without adding extra baluns or phase-shifter. [1][2][3] Moreover, utilizing a high-Q differential coupling network, the differential oscillator can be developed to be a push-pull or push-push oscillator with low-phase noise. [4][5][6][7][8] To broaden the operating frequency range and achieve phase-lock using the phase-lock-loop (PLL) technique in a front-end transceiver, the widely tuned differential voltage-controlled oscillators (VCOs) have drawn more attention.…”

Section: Introductionmentioning

confidence: 99%

“…Differential oscillator has been widely developed because it is can be directly fed into some balanced microwave components without adding extra baluns or phase‐shifter 1‐3 . Moreover, utilizing a high‐Q differential coupling network, the differential oscillator can be developed to be a push‐pull or push–push oscillator with low‐phase noise 4‐8 .…”

Section: Introductionmentioning

confidence: 99%

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Constantly low‐phase‐noise differential VCO based on balanced tunable quasi‐elliptic and constant‐ABW BPF

Tang

Liu

et al. 2021

Micro & Optical Tech Letters

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In this article, a parallel-feedback differential voltagecontrolled oscillator (VCO) with constantly low-phase noise and frequency tuning range (FTR) of 1.72-2.12 GHz (20.8%) is presented. The presented differential VCO with differential outputs and low-phase noise is achieved using a four-pole tunable balanced bandpass filter (BAL-BPF) with quasi-elliptic frequency response as a frequency stabilization element. The low-phase noise is obtained and maintained because of the high in-band group delay and the constant absolute bandwidth (CABW) of the used tunable BAL-BPF. For demonstration, an example is designed, fabricated, and measured. The measured oscillation frequency of the differential VCO can be tuned from 1.72-2.12 GHz (20.8%) and the phase noises keep better than −99 dBc/Hz @100 kHz and − 129.1 dBc/Hz @1 MHz over the FTR. In the meantime, the differential oscillating signals are generated at two outputs.

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