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A calibration method of satellite transponder test system

A satellite transponder and test system technology, which is applied in the field of communication, can solve the problems affecting the development progress of the whole satellite, low efficiency, cumbersome calibration process, etc., and achieve the effect of high convenience of calibration implementation, high degree of automation, and low human participation

Active Publication Date: 2019-06-18
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

Therefore, when calibrating multi-channel large-scale transponders with more uplinks and downlinks, more channels, wider bandwidths, and smaller frequency steps, the system calibration process will be extremely cumbersome and inefficient, and may even affect the entire satellite system. development progress

Method used

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  • A calibration method of satellite transponder test system
  • A calibration method of satellite transponder test system
  • A calibration method of satellite transponder test system

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Embodiment Construction

[0050] The test system hardware in the present invention is composed of a vector network analyzer, a switch matrix, two short cables between instruments and two star-ground test cables. An additional power meter (including a power sensor), a phase reference (comb generator) and an ECal module are also required for calibration.

[0051] The vector network analyzer is the PNA-X series of Keysight, and it needs to have Scalar Mixer / Converters+Phase measurement mode, Swept IMD Converters measurement mode and options 083 and 087, and the firmware version number must be A09.80.03 or higher . In addition, the phase reference U9391F (50GHz comb signal generator), power meter N1914 (with power sensor E4413A), and electronic calibration part N4692A are used successively during the calibration process to complete the phase reference establishment of the vector network analyzer. , source power calibration and two-port SC parameter calibration.

[0052] Such as Figure 6 Shown is the in...

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Abstract

A satellite transponder test system calibration method includes the steps of (1) establishing full-band phase reference for a receiver of a vector network analyzer (VNA); (2) calibrating a front link of a satellite transponder test system by taking a frequency band included by a satellite transponder under test as the unit; (3) calibrating a rear uplink by taking an uplink beam included by the satellite transponder under test; (4) calibrating a rear downlink by taking a downlink beam included by the satellite transponder under test as the unit; and (5) combining the results in the steps (2) to (4) into complete satellite-ground link calibration data. The method of the invention combines the test system composition principle and the satellite transponder framework and makes full use of the frequency synchronous tuning features and scanning calibration functions of the transmitter-receiver of the VNA to establish a plurality of measuring channels for parallel synchronous frequency scanning calibration, thereby significantly improving the efficiency, precision, implementing convenience and automation degree of the calibration before the test of the communication satellite transponder.

Description

technical field [0001] The invention belongs to the field of communications, and relates to a calibration scheme for a satellite transponder test system, which is especially suitable for large-scale transponders with a large number of beams and channels, complex cross-link combinations, and large channel bandwidth on the satellite. Under the premise of high calibration accuracy, the calibration efficiency of the system is greatly improved, thereby speeding up the testing and development progress of the whole star. Background technique [0002] With the continuous development of communication satellite platforms and the continuous improvement of users' demand for communication capacity, there are more and more antenna beams in the payload of communication satellites, and the number of transponders is also increasing, and the bandwidth of forwarding channels is increasing. , the cross-links between different beams are becoming more and more complex, the amount of radio frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 杨博杨冬雪侯卫国刘焕生谢华魏振超温洁周慧满梓峰
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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