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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

Inactive Publication Date: 2018-06-29
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, in cases where the source includes a power amplifier, this value is usually inaccurate if the source reflection coefficient is measured after calibration with a network analyzer offline

Method used

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  • Method for measuring source reflection coefficient of load traction system online
  • Method for measuring source reflection coefficient of load traction system online
  • Method for measuring source reflection coefficient of load traction system online

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses.

[0029] refer to figure 1 , the load pull system of this embodiment includes a signal source 1 , a power amplifier 2 , a source impedance adjuster 3 , a feed-through 4 , a load impedance adjuster 5 , and a power meter 6 connected to the load impedance adjuster 5 connected in sequence.

[0030] Specifically, the signal source 1 is used to provide a source signal for the entire system, and the power amplifier 2 is used to ampli...

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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.

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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Application Information

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IPC IPC(8): G01R27/06
Inventor 余庭
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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