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Radio-frequency amplifier intermodulation suppression level measurement method based on X-parameter

A radio frequency amplifier and intermodulation suppression technology, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve problems such as slow measurement speed, complicated experimental equipment and experimental requirements

Active Publication Date: 2016-12-07
BEIHANG UNIV
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Problems solved by technology

[0003] The existing RF amplifier intermodulation suppression level measurement method (CS103) is mainly the national standard GJB 151B-2013. This method is relatively complicated from the experimental equipment to the experimental requirements, and the measurement speed is slow.

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Embodiment Construction

[0042] Such as figure 2 Shown, the present invention is a kind of test method of the radio frequency amplifier intermodulation suppression level based on X parameter, and this method is at first the target X parameter of measuring DUT, and the target X parameter here mainly comprises: " in the radio frequency amplifier tuning operating frequency up (denoted as f c ), when the RF amplifier is tuned to the operating frequency (f c ) on the response power up to the standard reference output (N 0 +M) when outputting the X parameters of the corresponding first harmonic, second harmonic and third harmonic in the product". Among them, N 0 (unit: dBm) characterizes the power value corresponding to the output squelch level of the RF amplifier, M (≥0, unit: dBm) refers to the output noise power of the RF amplifier based on the output signal-to-noise ratio of the RF amplifier Need to increase the signal power, (N0 +M) is generally regarded as the standard reference output in the inte...

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Abstract

The invention relates to a radio-frequency amplifier intermodulation suppression level measurement method based on an X-parameter. The method comprises the step that the target X parameter of a radio-frequency amplifier is measured, wherein the target X parameter is a target parameter set; for the target X parameter, the scattered wave variable of the radio-frequency amplifier is acquired; the mapping relation among an incident wave variable, the scattered wave variable and signal power is constructed; and the intermodulation suppression level of the radio-frequency amplifier is acquired according to the mapping relation. According to the invention, the measurement method is simpler and more convenient that an intermodulation suppression level measurement method in the existing GJB151B-2013 in the aspects of experimental equipment and experimental steps.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility testing and relates to a method for measuring the intermodulation suppression level of radio frequency amplifiers based on X parameters. Background technique [0002] The X parameter is developed on the basis of the S parameter, which is a superset of the S parameter. The basic physical meaning of the X parameter refers to the component in the frequency domain of the reference response generated by the reference stimulus signal equivalent to the test stimulus signal. The X parameter describes the nonlinear behavior of the DUT (Device Under Test, here refers to the amplifier) ​​in the form of nonlinear spectrum mapping. The X-parameters represent the basic characteristics of the DUT's steady-state nonlinear behavior, usually in the form of input-output. In the field of electromagnetic compatibility testing, the measurement of the intermodulation suppression level of the RF amplifier i...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/001
Inventor 戴飞高占威苏东林刘泽郑涛王顺鑫
Owner BEIHANG UNIV
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