Antenna-feeder system intermodulation fault location method, device, equipment and storage medium
A technology of antenna feeder system and positioning method, which is applied in wireless communication, electrical components, transmitter monitoring, etc., and can solve problems such as the inability to accurately measure the specific location of a fault point
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Embodiment 1
[0041] An embodiment of the present invention provides a method for locating intermodulation fault points of an antenna feeder system, which can test wireless communication antenna feeder systems such as base station antennas and radio frequency cables, and detect specific fault points generated by intermodulation noise. A multi-port vector network analyzer 1, two radio frequency power amplifiers 2, a radio frequency combiner 3 and a radio frequency duplexer 4 are used to form the entire test system, and the multi-branch system under test (DUT) 5 is tested, such as image 3 shown. The vector network analyzer 1 itself has a radio frequency signal source and a radio frequency signal receiver. For the test system construction, there is no need to add a radio frequency signal source and radio frequency signal receiver separately, and one machine can be used for multiple purposes.
[0042] For easy understanding of the testing process, please refer to figure 1 , figure 2 and F...
Embodiment 2
[0059] Before step S10, power calibration of the radio frequency signal output module is also included, which is used for power calibration of the vector network analyzer.
[0060] In Embodiment 1, according to the cause of intermodulation, it can be seen that due to the existence of some passive components in the system, such as duplexers, combiners, amplifiers, etc., they themselves will generate passive intermodulation, which will affect the accuracy of measurement. The test error of the passive intermodulation measurement system is related to the material of the measured object, the degree of corrosion of the measured object, and the sensitivity of the receiver. In fact, the absolute value of the difference between the actual value of the measured object's intermodulation and the measured value is used Estimate the measurement error of the system:
[0061]
[0062] In the formula, Δδ is the actual relative error of system measurement, PIM O is the actual intermodulatio...
Embodiment 3
[0068] This embodiment provides an antenna feeder system intermodulation fault point M positioning device 50, such as Figure 6 shown, including:
[0069] The test signal transmitting module 501 is used to send two-way radio frequency pulse test signals to the input port In or the output port Out of the multi-branch system under test (DUT) 5;
[0070] Transmission distance test module 502, for determining the transmission distance of intermodulation fault point M to the output or input port In of multi-branch system under test (DUT) 5 according to the time difference of transmitting radio frequency pulse signal and receiving radio frequency pulse signal;
[0071] The fault point position comparison module 503 is used to compare the sum of the transmission distances from the intermodulation fault point M to the output of the multi-branch system under test (DUT) 5 or the input port In with the length of each branch, and determine the output The position of intermodulation fault...
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