Noise Calculations and Experimental Results of Varactor Tunable Oscillators with Significantly Reduced Phase Noise

Volker Güngerich; Franz Zinkler; Werner Anzill; Peter Russer

doi:10.1109/22.348085

Noise Calculations and Experimental Results of Varactor Tunable Oscillators with Significantly Reduced Phase Noise

Volker Güngerich, Franz Zinkler, Werner Anzill, Peter Russer

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18 Scopus citations

Abstract

The single-sideband phase noise of varactor tunable GaAs MESFET oscillators is investigated. Two oscillator circuits with different microstrip resonator circuits were designed and fabricated. Using a resonator consisting of coupled microstrip lines instead of a single microstrip line, which is a planar monolithically integrable structur, phase noise is reduced significantly because the quality factor is higher for the coupled resonator. The phase noise is calculated using a nonlinear time domain method, which solves the Langevin equations, describing the deterministic and stochastic behavior of an oscillator by pertubation methods. Calculated and measured phase noise agree within the accuracy of measurements. The very low phase noise of 95 dBc/Hz at 100 kHz offset frequency is achieved.

Original language	English
Pages (from-to)	278-285
Number of pages	8
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	43
Issue number	2
DOIs	https://doi.org/10.1109/22.348085
State	Published - Feb 1995
Externally published	Yes

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title = "Noise Calculations and Experimental Results of Varactor Tunable Oscillators with Significantly Reduced Phase Noise",

abstract = "The single-sideband phase noise of varactor tunable GaAs MESFET oscillators is investigated. Two oscillator circuits with different microstrip resonator circuits were designed and fabricated. Using a resonator consisting of coupled microstrip lines instead of a single microstrip line, which is a planar monolithically integrable structur, phase noise is reduced significantly because the quality factor is higher for the coupled resonator. The phase noise is calculated using a nonlinear time domain method, which solves the Langevin equations, describing the deterministic and stochastic behavior of an oscillator by pertubation methods. Calculated and measured phase noise agree within the accuracy of measurements. The very low phase noise of 95 dBc/Hz at 100 kHz offset frequency is achieved.",

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AU - Güngerich, Volker

AU - Zinkler, Franz

AU - Anzill, Werner

AU - Russer, Peter

PY - 1995/2

Y1 - 1995/2

N2 - The single-sideband phase noise of varactor tunable GaAs MESFET oscillators is investigated. Two oscillator circuits with different microstrip resonator circuits were designed and fabricated. Using a resonator consisting of coupled microstrip lines instead of a single microstrip line, which is a planar monolithically integrable structur, phase noise is reduced significantly because the quality factor is higher for the coupled resonator. The phase noise is calculated using a nonlinear time domain method, which solves the Langevin equations, describing the deterministic and stochastic behavior of an oscillator by pertubation methods. Calculated and measured phase noise agree within the accuracy of measurements. The very low phase noise of 95 dBc/Hz at 100 kHz offset frequency is achieved.

AB - The single-sideband phase noise of varactor tunable GaAs MESFET oscillators is investigated. Two oscillator circuits with different microstrip resonator circuits were designed and fabricated. Using a resonator consisting of coupled microstrip lines instead of a single microstrip line, which is a planar monolithically integrable structur, phase noise is reduced significantly because the quality factor is higher for the coupled resonator. The phase noise is calculated using a nonlinear time domain method, which solves the Langevin equations, describing the deterministic and stochastic behavior of an oscillator by pertubation methods. Calculated and measured phase noise agree within the accuracy of measurements. The very low phase noise of 95 dBc/Hz at 100 kHz offset frequency is achieved.

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JF - IEEE Transactions on Microwave Theory and Techniques

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Noise Calculations and Experimental Results of Varactor Tunable Oscillators with Significantly Reduced Phase Noise

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