Method and device for rapidly testing 1dB compression point of power amplifier
A compression point and fast technology, applied in the field of communication, can solve the problems of errors, affect the test results, cannot directly reflect the power of the compression point of the power amplifier, etc., and achieve the effect of accurate testing
Active Publication Date: 2017-03-22
SHANGHAI ULTIMATE POWER COMM TECH
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[0004] There are two traditional test methods, one is to use the vector network analyzer to test through power scanning, that is, the input terminal P1 of the vector network analyzer is connected to the input terminal of the power amplifier, and the output terminal of the power amplifier is connected to the attenuator and then output to the network analyzer. Due to the power amplitude sweep of the network analyzer, the operating current of the power amplifier will be very high, and the temperature will rise sharply, which will affect the test results
[0005] Another common test method is that the signal source sends a modulated signal source with a certain peak-to-average ratio into the power amplifier, the output terminal is connected to a coupler, the coupler is directly connected to a spectrum analyzer, and the complementary cumulative distribution function (CCDF) is measured, and the coupling terminal is connected to a power meter. Detect the power of the output signal. This method is the statistical value of the peak power and average power of the output signal. There is a certain error with the standard compression point power, and it cannot intuitively reflect the power of the power amplifier compression point.
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[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0036] figure 1 It is a flow chart of the method for quickly testing the 1dB compression point of the power amplifier in an embodiment of the present invention; refer to figure 1 , the method includes:
[0037] S101: After the input signal generated by the signal source enters the power amplifier to be tested, receive the output signal of the power amplifier to be tested;
[0038] It should be noted that the subject of execution of the method is a spectrum analyzer.
[0039] In a specific implementation, in order to prevent the temperature of the power amplifier to be tested from being too high due to a sharp rise in the operating current and affect the test results, in...
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The invention discloses a method and a device for rapidly testing a 1dB compression point of a power amplifier, and relates to the technical field of communication. The method provided by the invention comprises the steps of receiving an output signal of a power amplifier to be tested, and acquiring a power curve and a gain curve of the output signal, finding an nonlinear area in the gain curve, and determining the 1dB compression point of the gain curve in the non-linear area of the gain curve, and finding the 1dB compression point in the power curve according to the 1dB compression point of the gain curve, so as to determine the 1dB compression point power of the power amplifier to be tested, thus rapidly and accurately testing the 1dB compression point.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for quickly testing the 1dB compression point of a power amplifier. Background technique [0002] In a communication system, the power amplifier (PA) of the remote radio unit (RRU) is an important part of the transmission chain, and the power amplifier amplifies the low power level to a power level large enough for long-distance transmission. [0003] With the continuous development of modern digital mobile communication technology, users have higher and higher requirements for the performance of wireless devices, high-speed data transmission, and large-capacity bandwidth emerge as the times require. As the basic unit of the communication system, the power amplifier keeps increasing its output power and frequency bandwidth while ensuring linearity and efficiency, thus putting forward higher requirements on the performance of the power amplifier. The wor...
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IPC IPC(8): H04B17/13H04B17/15
Inventor程准王莉
OwnerSHANGHAI ULTIMATE POWER COMM TECH