Power measuring apparatus

Abstract

The present invention provides power measuring apparatuses of various thin film sensor types, which can easily measure, with a small configuration, power in high frequency circuits and batteries. This power measuring apparatus is provided with: a magnetic film, which is disposed in parallel to a primary conductor having a load current flowing therein; a power feed unit, which is provided with an input / output terminal that supplies an element current to the magnetic film; a bias magnetic field applying unit, which applies a direct current magnetic field that is parallel or perpendicular or diagonal to the magnetization direction of the magnetic film; and a detecting unit, which detects a voltage between the edge portions of the magnetic film in the element current direction. The power measuring apparatus detects merely a direct current voltage composition between the edge portions of the magnetic film in the element current direction.

Description

technical field [0001] The present invention relates to various thin-film sensor-type power measuring devices capable of measuring power of high-frequency circuits, batteries, and the like with a simple and compact structure. Background technique [0002] In recent years, the development of measurement systems including remote power probes has been advancing as the use environment such as the Internet has matured. Conventional power measurement has used an accumulative power meter that converts the used power into the number of rotations of a disc and performs an accumulative calculation. Recently, a sensor for detecting rotation, an ammeter (CT) or a voltmeter (PT) has been added to this integrated power meter, and the power is measured by multiplying by an electronic circuit or a microprocessor. As for the accumulative power meter, its device structure is complex, the device is not only large but also expensive, and because the power is output mechanically, it cannot ...

AI Technical Summary

Problems solved by technology

In addition, in the PHE-type power measurement device, there is also a limitation in the shape of the magnetic thin film that must be formed with a bridge circuit structure.

These circumstances mean that it is difficult to install PHE-type power measurement devices on special lines such as microstrip lines or coplanar lines used in high-frequency circuits.

[0009] There are other high-frequency power measuring devices such as bolometers and precision measuring devices, which are large and complicated in structure and very expensive, and are not suitable for power measurement / detection of various equipment or facilities.

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