A bridge method for simultaneous measurements of coupling coefficient and loaded Q of a single-ended cavity

Watanabe, Kentaro; Takao, Iwao

doi:10.1063/1.1686014

Cited by 9 publications

(1 citation statement)

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“…All entries are based on generated data. Eq(15) is not conformal at the pole because it is not analytic there, however it is an isogonal mapping at that point. See reference 29.…”

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confidence: 99%

Measurement of resonant frequency and quality factor of microwave resonators: Comparison of methods

Petersan

Anlage

1998

Journal of Applied Physics

233

172

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Precise microwave measurements of sample conductivity, dielectric, and magnetic properties are routinely performed with cavity perturbation measurements. These methods require the accurate determination of quality factor and resonant frequency of microwave resonators. Seven different methods to determine the resonant frequency and quality factor from complex transmission coefficient data are discussed and compared to find which is most accurate and precise when tested using identical data. We find that the nonlinear least-squares fit to the phase vs. frequency is the most accurate and precise when the signal-to-noise ratio is greater than 65. For noisier data, the nonlinear least squares fit to a Lorentzian curve is more accurate and precise.The results are general and can be applied to the analysis of many kinds of resonant phenomena.

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“…All entries are based on generated data. Eq(15) is not conformal at the pole because it is not analytic there, however it is an isogonal mapping at that point. See reference 29.…”

mentioning

confidence: 99%

Measurement of resonant frequency and quality factor of microwave resonators: Comparison of methods

Petersan

Anlage

1998

Journal of Applied Physics

233

172

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Q‐Factor Measurement

Luiten

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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The sections in this article are Definitions General Sources of Errors in Q Measurement Traditional Methods of Q Measurement Modern Measurement Techniques Acknowledgement

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Q‐Factor Measurements

Luiten

2005

Encyclopedia of RF and Microwave Engineering

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This article presents a review of both traditional and modern methods of Q factor measurement. Many of the techniques to be described were first developed in order to determine the Q factors of resonances falling in the microwave frequency domain. The article commences with a definition of the Q factor and a description of the experimental parameters that need to be measured so as to determine the Q factor of resonance. The various methods for measuring these parameters will then be outlined, including the particular advantages and disadvantages of a technique, the equipment required for the measurement, and its potential for accuracy. Finally, some of the latest developments in the field of Q measurement will be presented.

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A bridge method for simultaneous measurements of coupling coefficient and loaded Q of a single-ended cavity

Cited by 9 publications

References 1 publication

Measurement of resonant frequency and quality factor of microwave resonators: Comparison of methods

Measurement of resonant frequency and quality factor of microwave resonators: Comparison of methods

Q‐Factor Measurement

Q‐Factor Measurements

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