Extracting Anisotropic Permittivity of PCB Substrate from VNA Measurement on a Rectangular Stripline Resonator Loaded with a Via Array

A method for extracting anisotropic permittivity of PCB substrate is proposed and tested on a PCB test vehicle by using a rectangular stripline resonator loaded with a via array. As a value-added measurement after traditional isotropic permittivity measurement methods like SPP, for the first time, this method can add PCB substrate anisotropic permittivity of a practical industrial application for electrical modeling.