Method for measuring source reflection coefficient of load traction system online

A reflection coefficient and load-pulling technology, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as inaccuracy and achieve high precision
CN108226643AInactive Publication Date: 2018-06-29SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Publication Date
2018-06-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for measuring the source reflection coefficient of a load traction system online, comprising the following steps: obtaining the S parameter of a source impedance tunerthrough a vector network analyzer; opening a signal source and a power amplifier, and placing a load impedance tuner in a predetermined position; moving the source impedance tuner to multiple impedance points, and reading the power values corresponding to the multiple impedance points from a power meter; drawing a contour line of Smith chart through interpolation based on the power values corresponding to the multiple impedance points, and conjugating the reflection coefficient corresponding to the highest point of convergence of the contour line to obtain the source impedance; and obtaining the source reflection coefficient through calculation according to the S parameter and the source impedance. The method for measuring the source reflection coefficient of a load traction system onlineprovided by the invention has high accuracy.
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Description

technical field

[0001] The invention belongs to the field of radio frequency microwave measurement, and in particular relates to a method for online measurement of the source reflection coefficient of a load pulling system. Background technique

[0002] The purpose of load pull measurement is to provide different impedances and different available powers to the DUT at the input and output ends of the device under test (DUT), and then measure the characteristics of the DUT in these different environments, such as output power, efficiency and other parameters. The load-pull system is an essential system for load-pull measurement of high-power RF microwave power devices. The load-pull system generally consists of a signal source, a power amplifier, an input impedance adjuster, an output impedance adjuster, an attenuator, a power meter and other accessories. composition.

[0003] Before calibrating the system, it is necessary to characterize the S parameters of each path in the...

Claims

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