Method for judging power amplifier saturation in electromagnetic radiation sensitivity automatic test

A power amplifier, automatic test technology, applied in the fields of electromagnetic field characteristics, instruments, measuring electricity, etc., can solve the problems of reducing power amplifier performance, power amplifier damage, reducing test efficiency, etc., to reduce test time, reduce times, and ensure accuracy. sexual effect

Active Publication Date: 2013-05-08
BEIHANG UNIV
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Problems solved by technology

[0006] 1. This method uses the number of empirical cycles, which may have been cycled many times in the saturation region of the power amplifier, which takes a lot of time and reduces the efficiency of the test
[0007] 2. Continuously increasing the input signal amplitude in the saturation region of the power amplifier may cause damage to the power amplifier and reduce the performance of the power amplifier

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  • Method for judging power amplifier saturation in electromagnetic radiation sensitivity automatic test
  • Method for judging power amplifier saturation in electromagnetic radiation sensitivity automatic test
  • Method for judging power amplifier saturation in electromagnetic radiation sensitivity automatic test

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Embodiment Construction

[0027] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] A method for judging the saturation of a power amplifier in an automatic electromagnetic radiation susceptibility test, the process is as follows Figure 4 As shown, it has the following steps:

[0029] The first step is to set the initial cycle count value as i=1, and set the initial amplitude S of the signal source at the same time;

[0030] The output amplitude S of the signal source at different test frequency points is set according to the antenna factor of the antenna used.

[0031] The second step is to read the electric field strength value E at the test position 0 , the electric field strength value E 0 The unit is dBμV / m, which is convenient for subsequent calculations;

[0032] The third step is to judge the number of cycles i, and perform different operations according to the number of cycles i:

[0033] a. If i=1, execute the fo...

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Abstract

The invention discloses a method for judging power amplifier saturation in an electromagnetic radiation sensitivity automatic test, which belongs to the field of electromagnetic compatibility sensitivity tests. The method determines whether a power amplifier generates the gain compression condition or not by increasing a signal source output amplitude, calculating a difference value delta betweena standard limit value E and the practically detected electric field strength value E0 and adjusting the signal source output amplitude increment according to the difference value delta under the condition that the difference value delta does not meet a threshold value X and simultaneously comparing the relation between the difference value delta and the signal source output increment so as to judge whether the power amplifier enters a nonlinear saturation area or not and achieves the aims of determining the signal source output amplitude by dynamically adjusting the amplitude increment and judging whether the power amplifier output meets the standard limit value requirement or not. The method for judging the power amplifier saturation, disclosed by the invention, saves the test time, improves the test efficiency, prolongs the service life of the power amplifier and guarantees the accuracy of electromagnetic compatibility test results.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility automatic testing, in particular to a method for judging the saturation of a power amplifier in the automatic testing of electromagnetic radiation sensitivity. Background technique [0002] According to GJB151A-97 "Requirements for Electromagnetic Emission and Susceptibility of Military Equipment and Subsystems", electromagnetic compatibility testing includes two parts: electromagnetic interference (EMI) testing and electromagnetic susceptibility (EMS) testing, and electromagnetic susceptibility testing includes conduction sensitivity. Accuracy and radiation susceptibility testing. The basic principle of the sensitivity test is that the interference generating equipment produces a certain level of electromagnetic interference, and it is very time-consuming to manually adjust the signal source, so the EMC automatic test system is used to test the amplitude of the signal source for each ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08G01R31/00
Inventor 戴飞乔祁苏东林白天明徐坚赵子华崔燕舞
Owner BEIHANG UNIV
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