RU1805514C - Microwave load - Google Patents

Abstract

The invention relates to microwave technology and can be used in high power level devices. In order to provide the possibility of adjusting the reflection coefficient, a winding, magnetizing coils are placed on the outer surface of the load. In this case, in order to ensure uniform absorption of power, the winding can be made with a variable cross-section along the length or in separate sections. In order to improve the heat transfer between the winding sections, gaps can be made. 3 s P. f-ly, 3 ill.

Description

The invention relates to microwave technology and can be used as a terminal or pass-through absorbing load when transmitting large powers, as well as in microwave heating.

An object of the invention is to provide the ability to adjust reflectance.

In FIG. Figure 1 shows a sectional microwave load with a magnetizing coil; in FIG. 2 - the same, the winding of the magnetization coil is made with a variable cross section along the length; in FIG. 3 - the same, the magnetization coil is made in the form of separate sections. The direction of the wave is shown by the arrow.

The microwave load contains a segment of the transmission line 1, made of a package of metal plates 2 of electrical steel with an oxide layer on the surface. The plates 2 are located in the plane of the microwave vector electric field and are provided with holes 3 of a given profile. A magnetizing coil with a winding 4, 5 or 6, mounted on a non-magnetic frame 7 and connected to a constant current source (Figs. 1, 2 and 3) is placed on the outer surface of the transmission line section. The winding 5 of the magnetization coil is made with a variable cross section along the length (Fig. 2). The winding 6 of the magnetization coil is made in the form of separate sections connected to different DC sources (Fig. 3). Between the winding sections 6, gaps 8 are made.

When magnetizing a microwave load with a direct current, the magnetic permeability of the walls of a section of a transmission line made of ferromagnetic material changes, and therefore, the absorption capacity of the load changes. By changing the magnitude of the magnetization current, it is possible to control the absorption capacity of the load, and therefore, the reflection coefficient or the backward wave.

Using the proposed microwave load allows you to adjust the reflection coefficient, uniform absorption of power throughout

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length of the load and improve heat transfer from the load surface. At the same time, the adjustment is smooth, simple and does not require large expenditures of power.

Claims (4)

SUMMARY OF THE INVENTION 1. A microwave load comprising a segment of a transmission line that is made of a package of metal plates with high magnetic permeability and low electrical conductivity made of electrical steel with an oxide layer on the surface, the plates being located in the plane of the microwave electric vector floor and provided with holes, characterized in that, in order to ensure adjustment of the reflection coefficient, on the outer surface of the segment 0 0 The transmission line contains a magnetization coil connected to a direct current source. 2. The microwave load according to claim 1, with the aim that, in order to ensure uniform absorption of power, the winding of the magnetization coil is made with a variable cross-section along the length. 3. The microwave load according to claim 1, characterized in that the coil is made in the form of separate sections connected to different DC sources. 4. The microwave load according to claim 3, with the exception that, in order to improve heat transfer, gaps are made between the winding sections.