SU1626138A1 - Device for measuring characteristics of materials - Google Patents

Abstract

The invention relates to the control and measuring microwave technology and can be used in technological processes of the electronics industry in monitoring the electrical parameters of cylindrical samples (CO) of semiconductor, dielectric materials or their structures. The purpose of the invention is to increase the localization of measurements of the central heating station. The device contains a segment 1 of a rectangular waveguide, in which the source of 2 microwave oscillations is located, a detector of 3 microwave oscillations, two coaxial metal rods 4 and 5, which are movable along its axis, with holes 6 and 7 to accommodate the central heating as well as the registering device 10. To increase the measurement locality, a movable short-circuit piston 8 with a groove 9 is used. Performing it with the possibility of moving from the rods 4 and 5 ensures effective interaction of the microwave field in section 1 advantage But with a part of the central location in a sufficiently small gap, and not with parts of the rods 4 and 5. The consequence of this is a strong dependence of the amplitude of the standing wave and, consequently, the readings of the device 10 on the parameters of the central heating. 4 il.

Description

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Claims (1)

Claim A device for measuring the parameters of materials, containing a sensor made in the form of a segment of a rectangular waveguide, one end of which is connected to the output of a microwave source, a recording device connected to a segment of a rectangular waveguide, on the opposite wide walls of which are two coaxial metal rods, characterized in that, in order to increase the locality of measurements of cylindrical samples, a hole was made along the axis of the metal rods to place the cylindrical sample at a distance I from the metal rods at the other end of the segment of the rectangular waveguide, an inserted short-circuit piston is installed, in which a groove is made in the form of a part of the surface of the cylinder, the axis of which is parallel to the axis of the metal rods and located at a distance Ι-r from them, the height p ^ is the distance between the metal rods , and the radius R and the distance I are selected from the relations ⁵ where a. b - dimensions of the wide and narrow walls of a segment of a rectangular waveguide; Yu g - the radius of the metal rods. Rim Wave axis W] ^y th I, ^ *** 6 F2g g * - * · y ¹ L2ZZZZZZpZZZZZZZZZ2 ^^ S ^^ S eleven F2 g I * - to the center of the manhole FIG. 2 Fig.Z FIG. 4