Microwave power probe temperature compensation device based on USB interface

Abstract

The invention belongs to the technical field of microwave power probes, and relates to a microwave power probe temperature compensation device based on a USB interface. The microwave power probe temperature compensation device based on the USB interface comprises a computer, a signal generator, a USB concentrator, multiple power meter mainframes and power probes. The computer is provided with a GPIB card which is connected with the signal generator through GPIB cables, the computer is connected to the USB concentrator through line concentration USB cables, the USB concentrator is connected with the power meter mainframes respectively through multiple USB cables, and each power meter mainframe is connected with one power probe through an independent 12-core cable. The microwave power probe temperature compensation device based on the USB interface can achieve simultaneous temperature compensation of probes of multiple types / multiple types of power, and is high in reliability and success rate, simple in line connection and easy to operate.

Description

technical field [0001] The invention relates to temperature compensation technology, in particular to a temperature compensation device for a microwave power probe based on a USB interface, and belongs to the related technical field of microwave power probes. Background technique [0002] Diode detector microwave power probes are widely used in the prior art. They have the advantages of large dynamic range and fast measurement speed. However, diode detectors are greatly affected by the environment, and the errors of power values ​​measured at different temperatures are relatively large. In order to To ensure the measurement accuracy of the power sensor at various temperatures, it is necessary to perform accurate temperature compensation on the power sensor. Most of the early microwave power meters have GPIB interface, so the temperature compensation of the microwave probe is based on the GPIB interface. The technical solution is to install a GPIB card in the computer, conne...

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Problems solved by technology

[0002] Diode detector microwave power probes are widely used in the prior art. They have the advantages of large dynamic range and fast measurement speed. However, diode detectors are greatly affected by the environment, and the errors of power values ​​measured at different temperatures are relatively large. In order to To ensure the measurement accuracy of the power sensor at various temperatures, it is necessary to perform accurate temperature compensation on the power sensor

However, this temperature compensation device and method have the following defects: 1. The GPIB cable is thick and heavy, and the connection is inconvenient, which leads to complicated connection of the compensation device and poor reliability; 2. Since the compensation system is programmed in series through the GPIB cable, if a certain cable in the If it is loose, the host of the power meter behind and the computer cannot communicate, resulting in a low success rate of temperature compensation, only 50% to 60%; 3. Multiple / multiple models of microwave power sensors cannot be compensated at the same time, and the compensation efficiency is low

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