On accuracy increasing of measuring galvanomagnetic converters of electromagnetic field

Abstract

The galvanomagnetic converters of electromagnetic fields on the basis of thin ferromagnetic films find application in feed-through RF and microwave power of average and high levels in transmission lines with a unmatched load. The target signal of such converters is proportional to product of electrical and magnetic fields components in view of shift of phases between them. The galvanomagnetic converters on the basis of thin magnetic films have a number of advantages in comparison with similar semi-conductor, that makes it more perspective for application.

The error of a method of power measurement by galvanomagnetic converters consists of a error of installation of phase ratio between a current in a film and intensity of a variable magnetic field in a film in relation to shift of phases between a current and a voltage in a transmission line, as well as from specific square-law making in a target signal of a converter. These square-law components are proportional to a square of a current and voltage in a transmission line.