By Topic

A circle fitting procedure using semi-parametric modelling: Toward an improved sliding load calibration procedure

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)

Circle fitting problems often occur in microwave engineering when dealing with variable delays (e.g. calibration using a sliding load). In this paper an efficient semi-parametric circle fitting procedure is proposed which takes into account the phase relationships over the frequencies. It produces more accurate results by the parsimonious principle, requires less measurements and is more robust to the settings of the positions of the sliding load than the nonparametric model [1]. Using the variance of the estimates, optimal position settings are proposed together with a statistically based validation technique to detect systematic errors with respect to the circle model. The performance of the proposed method is illustrated on sliding load measurements up to 50 GHz, illustrating that the accuracy of the semi-parametric method using 3 positions is comparable to the nonparametric method with 6 positions

Published in:

Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE  (Volume:2 )

Date of Conference:

1996