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Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module

A technology of automated testing and RF power amplifier, applied in transmission system, transmitter monitoring, transmission monitoring, etc., can solve problems such as unusable power supply and burning out power supply, and achieve the effects of improving test speed and progress, shortening test time, and avoiding damage

Active Publication Date: 2009-02-25
WUHAN HONGXIN TELECOMM TECH CO LTD
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AI Technical Summary

Problems solved by technology

The power supply and peripheral circuits of the power amplifier module are designed under the condition of its rated power. If a signal 10 times higher than the rated power is applied to the power amplifier module, the power supply in the module will definitely be burned.
The traditional network sub-test method cannot be used for the 1dB compression point test of high-power linear power amplifiers

Method used

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  • Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module
  • Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module
  • Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 1 It shows a high-power power amplifier module 1dB compression point test system of a specific embodiment of the present invention, said system includes signal source SG, spectrum analyzer SA, PC, a switchboard, 2 isolators (not shown in the figure) , attenuator, test control panel. Among them, the signal source SG, the spectrum analyzer SA, and the PC are connected to the switch through a network cable to form a local area network LAN so that the above three can communicate through the local area network. The signal source SG is connected to the downstream input port of the power amplifier module to be tested through a radio frequency cable, and the signal source SG is connected to the spectrum analyzer through a trigger line and a reference clock line (the trigger line and the reference clock line are not BNC coaxial lines), r...

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Abstract

The invention relates to a system for automatic test of 1 dB compression points in a high-power radio frequency power amplifier module and a method thereof. The system comprises a signal source, a frequency spectrograph, a personal computer, a switch, an isolator, an attenuator, and a testing control panel; wherein the signal source, the frequency spectrograph and the personal computer constitute a local-area network via the switch, the signal source provides input power signals to a power amplifier module to be tested, the frequency spectrograph obtains the output power of the power amplifier module to be tested and reports to the personal computer to compute gains, and hereby the personal computer computes the next output power of the signal source and searches 1 dB compression points in the power amplifier module to be tested by using the principle of dichotomy after the power amplifier module to be tested enters a nonlinear operating area. The inventive system can realize automatic test of 1 dB compression points in the high-power radio frequency power amplifier module with no damage on power amplifiers and remarkably improved test speed and progress; and the testing error is controlled to be 0.1 dB, and the testing time of each power amplifier module is shortened to be 30 seconds.

Description

technical field [0001] The invention relates to an automatic test system and method for the 1dB compression point of a high-power radio frequency power amplifier module. Background technique [0002] The three mainstream systems of third-generation mobile communication technology, WCDMA, CDMA2000, and TD-SCDMA, are all characterized by high-speed, broadband, and large-capacity data services. Although the modulation methods of each system are different, they all have an impact on the linearity of RF power amplifiers. strict requirements. At present, the linear technologies of power amplifiers mainly include analog operating point back-off technology, analog pre-distortion technology, and digital pre-distortion technology. Due to the low working efficiency, the analog back-off technology can only be used in low-power power amplifiers; the high-power linear power amplifiers of mobile communication base stations and RRUs often use digital pre-distortion technology. Digital pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04Q7/34H04B17/10
Inventor 王峰程翔冯战奎
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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