SU1698855A1 - Method of determining saturation magnetization at microwave frequencies - Google Patents

Abstract

This invention relates to a technique for monitoring the saturation magnetization of ferrites on microwave. The purpose of the invention is the extension of the foot of the method — achieved by simultaneously acting on post 1: a curved magnetic field lying in the plane of the electromagnetic field film at two frequencies and fixing the output signal. In the film, conditions are created for the formation of a wavelength magneto-static wave and an electromotive wave at each band. On the basis of the interaction between these BOTH patterns for two frequencies, the constant propagation of these waves is determined, and the intricacies of these conditions are calculated by the formula for the NER value given in the description of the invention. 2 Il. Q 8

Description

The invention relates to radio measurements on microwave, more precisely to measurements of parameters of ferrite films.

The aim of the invention is to expand the range of measured films. s

FIG. 1 shows a functional diagram of the device that implements the method of measurement; in fig. 2 - interference pattern, removed from the receiving antenna by the recording device.

The microwave signal is fed to the exciter 1 in the form of a microstrip line, which excites a surface magnetostatic wave (1KB) and a fast electromagnetic pickup wave in the ferrite film 2. The receiving device 3 in the form of a label on the coaxial moves near the surface of the ferromagnetic film and receives a total signal, which

is transmitted to a recording device (e.g., a recorder).

As a result, the interference pattern of the interaction of fast electromagnetic and magnetostatic waves (Fig. 2) is determined.

From this picture the constant spreading of NSV is determined as follows

in a way.

K - 1G / D1,

where D1 is the distance between neighboring

interference minima (maxima).

The JjHcnepcuoHJ cP equation for the surface MRV is written as follows.

1 ± 2pcthkd + (U-fUQ Oh,

where (U COU (NY + GJM) - “2J -OO2;

(IR.

about.

CD 00 00

sa ate

) / ();

Ii-roChg

(U0 - Nascene magnetization; d - ferrite film thickness; W 2tsN - signal frequency; Y - gyromagnetic: ratio. By sending a signal to a pathogen at 2 different frequencies and measuring the corresponding constant propagation from the interference pattern, one can measure the saturation magnetization

%

1 f () (1

u

0ill

 + cthk, d) -l / Ccthkp

Claims (1)

Invention Formula A method for determining the saturation magnetization of ferrites on a microwave, including the simultaneous action of a constant magnetic field lying in the film plane, and electromagnetic fields, successively applied at two frequencies, and measuring five output signals, which, in order to expand the range of measured films, excites in each film a magnetostatic surface wave, and an electromagnetic wave, according to the interference pattern for each frequency, when these waves interact the distance between two adjacent interference maxima or minima is determined, and the saturation magnetization is calculated using the formula 1 J2 (uf-u3j) (1 + 2П +) - 1 / (f + cthKJd), 4ff | Mc ferrite film thickness; 27 / L1 1g; gyromagnetic; attitude; the distance between adjacent interference minima (maxima); input frequency. , I / one ABOUT t P 2 7 FIG. one ABOUT V I I . L Thebes. 2