Iterative Loewner Matrix Passivity Correction Technique

This paper presents a passive correction technique using the Loewner matrix (LM) algorithm for modeling distributed circuits characterized by frequency-domain data. A methodology is described based on a frequency point selection technique, which increases the likelihood that the reduced Loewner matrices form a passive system. This process of adding data points to correct passivity is repeated until the LM model is passive. A numerical example is provided to illustrate the validity of the proposed work.