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Intermodulation distortion testing method of high-power device

A technology of intermodulation distortion and testing methods, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of difficult measurement of high-power amplifier intermodulation indicators and difficult detection of high-power amplifiers, so as to increase product added value and save The effect of high cost and test accuracy

Active Publication Date: 2014-03-26
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the intermodulation index of high-power amplifiers is difficult to measure at present, which is a difficult point in the detection of high-power amplifiers.

Method used

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  • Intermodulation distortion testing method of high-power device
  • Intermodulation distortion testing method of high-power device
  • Intermodulation distortion testing method of high-power device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, the test device of the present invention comprises a network analysis platform 10, a first power amplifier 11, a second power amplifier 12, a signal separation test device 13, and a signal separation test device is connected to a load 14, a horn antenna 21, and an antenna feeder system 22 under test. Connect, the horn antenna 21 and the antenna feeder system under test are placed in the microwave anechoic chamber 20; a kind of high-power intermodulation distortion test method in the present embodiment, wherein, comprise the following steps:

[0034] Step 1: Connect the test device, the first power amplifier, the second power amplifier and the network analyzer to the DUT;

[0035] Step 2: Test the passive intermodulation of the DUT;

[0036] Step 3: The network analyzer simultaneously displays the test results of transmit PIM and transmit PIM.

[0037] In the step 1, the test device includes 1 combiner and 2 duplexers, isolators or

[0038] Or ...

Embodiment 2

[0047] On the basis of the above examples, if figure 2 As shown, in this embodiment, the form standard +43dBm test signal is amplified by the first amplifier and the second amplifier, and is combined by the test device to form a dual-tone signal. Two isolators are used at the front end of the combiner to prevent the amplifier from generating active interaction. Tune. The dual-tone signal is loaded to the antenna-feeder system under test through the cavity filter in the first duplexer. The reflected PIM interference generated by the antenna feeder system enters the first duplexer, and is sent to the receiver channel through the cavity filter channel in the first duplexer, and is received by receiver A.

[0048] The generated transmission PIM products and dual-tone signals are emitted by the antenna feeder system, except for the energy received by the other horn antenna, the rest is absorbed by the absorbing material of the microwave anechoic chamber. The dual-tone signal and...

Embodiment 3

[0052] Based on the above-mentioned examples, as image 3 As shown, the test device of an embodiment of the present invention includes a network analysis platform 10, a first power amplifier 11, a second power amplifier 12, a signal separation test device 13, and the signal separation test device is connected with a load 14 and a transceiver antenna 21, The combined transceiver antenna 21 is placed in the microwave anechoic chamber 20;

[0053] A kind of high-power intermodulation distortion test method in the present embodiment, comprises the following steps:

[0054] Step 1: Connect the test device, the first power amplifier, the second power amplifier and the network analyzer to the DUT;

[0055] Step 2: Test the passive intermodulation of the DUT;

[0056] Step 3: The network analyzer simultaneously displays the test results of transmit PIM and transmit PIM.

[0057] In the step 1, the test device includes 1 combiner and 2 duplexers and isolators or 1 triplexer and 1 du...

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Abstract

The invention provides an intermodulation distortion testing method of a high-power device. The intermodulation distortion testing method of the high-power device comprises the steps that (1) a testing device, a first power amplifier, a second power amplifier and a network analyzer are connected with a tested part, (2) passive intermodulation or active intermodulation of the tested part is tested, (3) the network analyzer displays the intermodulation testing result, when passive intermodulation is carried out, a transmission PIM test result and an emission PIM test result are displayed at the same time, and when active intermodulation is carried out, the dual-tone signal power and the IM power of a tested amplifier are displayed at the same time. According to the scheme, a system formed by a device can be used for measuring the passive intermodulation characteristics of passive microwave device components, antennas and antenna feeder systems, and the active intermodulation characteristics of high-power amplifiers, and complete intermodulation distortion testing is provided for a communication system.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a high-power intermodulation distortion testing method based on a built-in dual-source network analysis platform. Background technique [0002] In the application of modern communication systems, such as cellular communication, ship communication, satellite communication, etc., there are many channels, high transmission power, high receiver sensitivity, and often the antennas exist in a limited space or the transceiver antennas are placed together. At this time, the intermodulation products formed by the transmitted signal just fall into the receiving frequency band and enter the receiver. When the communication system is busy, it will seriously affect the performance of the receiver, affect the communication indicators such as detection probability and bit error rate, and even cause system paralysis . [0003] In the communication system, the sources of this product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/15H04B17/29
Inventor 王尊峰杨保国李明太马景芳
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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