BROADBAND MICROWAVE MEASUREMENTS OF RELATIVE PERMITTIVITY AND PERMEABILITY OF MATERIALS

Abstract

measuring complex permittivity and permeability of materials at
broadband microwave frequencies has been presented. Classification of
type of the measurement methods to extract the complex permittivity
and permeability of bulk materials has been done in this paper.
Mathematical models of all the above-mentioned measurement types of
methods are reviewed. Advantages and disadvantages of existing
measurement devices/systems are described according to the
classification made. A new design of test devices for the measurement
system operating in broadband microwave frequency range has been
proposed. Measurement system on the basis of the proposed device
can be used for a measuring the ordinary bulk materials, ferrites
(including fully magnetized) and magnetic materials but much cheaper
then one to be made. The system is much cheaper than a free space
measurement system. The approach to define the permeability tensor of
magnetic materials using the test device is proposed as well.