CN113219246A - Detection method for detecting power amplifier harmonic intensity detection device - Google Patents
Detection method for detecting power amplifier harmonic intensity detection device Download PDFInfo
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- CN113219246A CN113219246A CN202110599738.4A CN202110599738A CN113219246A CN 113219246 A CN113219246 A CN 113219246A CN 202110599738 A CN202110599738 A CN 202110599738A CN 113219246 A CN113219246 A CN 113219246A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
- G01R23/18—Spectrum analysis; Fourier analysis with provision for recording frequency spectrum
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Abstract
The invention relates to a detection method for testing a power amplifier harmonic intensity detection device, which comprises the following process flows of: firstly, setting up detection configuration, manually changing default parameters inside a signal generator, manually changing the default parameters of a spectrum analyzer, recording the maximum fundamental wave peak value and the maximum harmonic peak value on the time-frequency spectrum analyzer, comparing the peak values, subtracting the fundamental wave peak value from the maximum harmonic peak value to obtain a difference value, receiving the set signal generator to transmit on the calibrated expected fundamental wave frequency and intensity, monitoring the fundamental wave and harmonic intensity on the spectrum analyzer after passing through a power amplifier, then comparing whether the fundamental wave intensity on the spectrum analyzer is greater than the harmonic intensity by 15dB, and if the fundamental wave intensity is greater than 15dB, indicating that the harmonic of the power amplifier meets the requirements, otherwise, not meeting the requirements. Therefore, the purpose of judging whether the internal harmonic intensity of the power amplifier exceeds the specified range is achieved. The invention has the advantages of rapidness, high efficiency and accuracy.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a detection method for testing a power amplifier harmonic intensity detection device in the technical field of electromagnetic compatibility detection.
[ background of the invention ]
Electronic components are important components of various electronic devices. Before various electronic devices are sold in the market, it is necessary for manufacturers to detect whether various electronic components or electronic devices can normally operate. And the power amplifier is a main instrument for detecting electronic components or electronic equipment. The performance of the power amplifier is easily reduced because the power amplifier is used frequently in our daily detection activities. The detection laboratory is particularly concerned with the use of power amplifiers because the total power measured by the power meter includes both fundamental and harmonic components, and harmonics can significantly affect the measurements made by the test level adjustment procedure. However, it is impossible to know whether the intensity of the harmonic wave in the power amplifier is out of a specific range.
[ summary of the invention ]
In view of the above, the technical problem to be solved by the present invention is to provide a fast, efficient and accurate detection method for testing a harmonic intensity detection apparatus of a power amplifier, which can determine whether the internal harmonic intensity of the power amplifier exceeds a specified range.
Therefore, the technical scheme of the invention relates to a detection method for testing a power amplifier harmonic intensity detection device, which comprises the following steps:
firstly, connecting one end of a signal generator with one end of a power amplifier, connecting the other end of the power amplifier with a directional coupler, connecting a power meter in series with the directional coupler, connecting one end of a transformer T2 with the directional coupler, and connecting the other end of the transformer T2 with a coupling device; one end of the attenuator is connected with the coupling device, the other end of the attenuator is connected with the spectrum analyzer, and the detection configuration is built; and checking whether each device can be normally started;
secondly, manually changing default parameters inside the signal generator by an operator, and modifying the transmitting frequency of the signal generator to 0.15 MHz;
step three, an operator manually changes the emission intensity of a signal source in the signal generator to be 1V;
fourthly, an operator opens a transmitting switch in the signaling generator and transmits signals;
fifthly, manually changing default parameters of the spectrum analyzer by an operator, changing the default analysis bandwidth of the spectrum analyzer to 100KHz, changing the default frequency range of the spectrum analyzer to 100KHz to 1000MHz, changing the default attenuation parameters of the spectrum analyzer to 0dB, and manually changing the detection mode to peak detection;
a sixth step of recording the maximum fundamental wave peak value and the maximum harmonic wave peak value on the time-frequency spectrum analyzer;
step seven, comparing peak values, and subtracting a difference value obtained by the fundamental wave peak value from the maximum harmonic wave peak value, wherein the difference value is smaller than-15;
an eighth step of modifying the emission intensity value 1V in the third step to an emission intensity value 3V and an emission intensity value 10V, respectively, and then repeating the contents in the fourth step to the contents in the seventh step in sequence;
a ninth step of sequentially modifying the emission frequency value of 0.15MHz in the second step to an emission frequency value of 0.5MHz, an emission frequency value of 1MHz, an emission frequency value of 10MHz, an emission frequency value of 50MHz and an emission frequency value of 80MHz, and repeating the contents in the third step to the contents in the seventh step;
and step ten, summarizing and comparing the difference values in all the results, recording the difference values in the difference value table, and finally judging whether the results are qualified or unqualified.
The invention has the beneficial technical effects that: because of this application technical scheme is through adopting behind the detection device, receive and set up signal generator and launch on calibration anticipated fundamental wave frequency and intensity, monitor fundamental wave and harmonic intensity on the spectrum analyzer through power amplifier, then whether contrast fundamental wave intensity on the spectrum analyzer is greater than harmonic intensity 15dB, if be greater than 15dB then show power amplifier's harmonic satisfies the requirement, otherwise unsatisfied. Therefore, the purpose of judging whether the harmonic intensity in the power amplifier exceeds the specified range is achieved. Compared with the existing similar detection method, the method has the advantages of rapidness, high efficiency and accuracy.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the physical connection used in the detection method of the present invention;
FIG. 2 is a schematic diagram of the structural principles of the detection arrangement of the present invention;
FIG. 3 is a data statistics diagram of the difference table of the present invention.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 3, a detection method for testing a harmonic intensity detection apparatus of a power amplifier is described below with reference to an embodiment, and the detection apparatus using the detection method includes a coupling apparatus, an attenuator, a spectrum analyzer, a transformer T2, a directional coupler, a power amplifier, a signal generator, and a power meter. One end of the coupling device is connected with an attenuator, and the other end of the coupling device is connected with a transformer T2.
The other end of the attenuator is connected with the spectrum analyzer, the other end of the transformer T2 is connected with the directional coupler, one end of the directional coupler is connected with the power amplifier, the other end of the power amplifier is connected with the signal generator, and the power meter is connected in series with the directional coupler to build the detection configuration.
The detection method for testing the harmonic intensity of the power amplifier by using the detection configuration comprises the following steps:
firstly, a user connects one end of a signal generator with one end of a power amplifier, the other end of the power amplifier is connected with a directional coupler, a power meter is connected with the directional coupler in series, one end of a transformer T2 is connected with the directional coupler, and the other end of the transformer T2 is connected with a coupling device; one end of the attenuator is connected with the coupling device, the other end of the attenuator is connected with the spectrum analyzer, and the detection configuration is built; and checking whether each device can be normally started;
secondly, manually changing default parameters inside the signal generator by an operator, and modifying the transmitting frequency of the signal generator to 0.15 MHz;
step three, an operator manually changes the emission intensity of a signal source in the signal generator to be 1V;
fourthly, an operator opens a transmitting switch in the signaling generator and carries out signal transmitting action;
fifthly, manually changing default parameters of the spectrum analyzer by an operator, changing the default analysis bandwidth of the spectrum analyzer to 100KHz, changing the default frequency range of the spectrum analyzer to 100KHz to 1000MHz, changing the default attenuation parameters of the spectrum analyzer to 0dB, and manually changing the detection mode to peak detection;
a sixth step of recording the maximum fundamental wave peak value and the maximum harmonic wave peak value on the time-frequency spectrum analyzer;
step seven, comparing peak values, and subtracting a difference value obtained by the fundamental wave peak value from the maximum harmonic wave peak value, wherein the difference value is smaller than-15;
an eighth step of modifying the emission intensity value 1V in the third step to an emission intensity value 3V and an emission intensity value 10V, respectively, and then repeating the contents in the fourth step to the contents in the seventh step in sequence;
a ninth step of sequentially modifying the emission frequency value of 0.15MHz in the second step to an emission frequency value of 0.5MHz, an emission frequency value of 1MHz, an emission frequency value of 10MHz, an emission frequency value of 50MHz and an emission frequency value of 80MHz, and repeating the contents in the third step to the contents in the seventh step;
and step ten, summarizing and comparing the difference values in all the results, recording the difference values in the difference value table, and finally judging whether the results are qualified or unqualified.
In the detection method, after the detection device is adopted, the received signal is transmitted by the signal generator on the basis of the expected fundamental wave frequency and intensity, the fundamental wave and the harmonic wave intensity are monitored on the spectrum analyzer after passing through the power amplifier, then whether the fundamental wave intensity on the spectrum analyzer is greater than the harmonic wave intensity by 15dB or not is compared, if the fundamental wave intensity on the spectrum analyzer is greater than 15dB, the harmonic wave of the power amplifier meets the requirement, and otherwise, the harmonic wave does not meet the requirement. Therefore, the purpose of judging whether the harmonic intensity in the power amplifier exceeds the specified range is achieved. Compared with the existing similar detection method, the method has the advantages of rapidness, high efficiency and accuracy.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.
Claims (1)
1. A detection method for testing a power amplifier harmonic intensity detection device comprises the following steps:
firstly, connecting one end of a signal generator with one end of a power amplifier, connecting the other end of the power amplifier with a directional coupler, connecting a power meter in series with the directional coupler, connecting one end of a transformer T2 with the directional coupler, and connecting the other end of the transformer T2 with a coupling device; one end of the attenuator is connected with the coupling device, the other end of the attenuator is connected with the spectrum analyzer, and the detection configuration is built; and checking whether each device can be normally started;
secondly, manually changing default parameters inside the signal generator by an operator, and modifying the transmitting frequency of the signal generator to 0.15 MHz;
step three, an operator manually changes the emission intensity of a signal source in the signal generator to be 1V;
fourthly, an operator opens a transmitting switch in the signaling generator and transmits signals;
fifthly, manually changing default parameters of the spectrum analyzer by an operator, changing the default analysis bandwidth of the spectrum analyzer to 100KHz, changing the default frequency range of the spectrum analyzer to 100KHz to 1000MHz, changing the default attenuation parameters of the spectrum analyzer to 0dB, and manually changing the detection mode to peak detection;
a sixth step of recording the maximum fundamental wave peak value and the maximum harmonic wave peak value on the time-frequency spectrum analyzer;
step seven, comparing peak values, and subtracting a difference value obtained by the fundamental wave peak value from the maximum harmonic wave peak value, wherein the difference value is smaller than-15;
an eighth step of modifying the emission intensity value 1V in the third step to an emission intensity value 3V and an emission intensity value 10V, respectively, and then repeating the contents in the fourth step to the contents in the seventh step in sequence;
a ninth step of sequentially modifying the emission frequency value of 0.15MHz in the second step to an emission frequency value of 0.5MHz, an emission frequency value of 1MHz, an emission frequency value of 10MHz, an emission frequency value of 50MHz and an emission frequency value of 80MHz, and repeating the contents in the third step to the contents in the seventh step;
and step ten, summarizing and comparing the difference values in all the results, recording the difference values in the difference value table, and finally judging whether the results are qualified or unqualified.
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