Multi-channel amplitude and phase test system
An amplitude-phase test and multi-channel technology, which is applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of high cost, large and complex equipment, etc., and achieve low cost, wide measurement range, configuration and measurement accuracy high effect
Inactive Publication Date: 2017-10-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
However, domestic research on amplitude and phase test systems is still relatively small, and the indicators of commercialized vector network analyzers are far from the world's advanced level. For example, the NA7000 series vector network analyzer produced by Deli Electronics has a frequency range of only 300KHz. Up to 3GHz, the maximum output power is 10dBm
[0008] Although the current test equipment has excellent performance in various measurement indicators, there are problems such as high cost, large and complex equipment, etc.
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[0032]One embodiment of the present invention provides a multi-channel amplitude and phase testing system. The system includes a chassis and a test main module located in the chassis, which is convenient for loading, unloading and transportation. see figure 1 , it can be seen from the figure that the main body of the test system adopts a modular design, including a signal sending module, a signal conditioning network, a signal receiving module, a frequency source module, a PCIe backplane and a blade computer. The upper computer software running on the blade computer sends configuration information and control instructions to the signal transmission module through the PCIe backplane, and the control signal transmission module generates the multi-beam amplitude and phase signals required by the user. The signal conditioning network performs analog filtering, amplification and other processing on the signal to obtain the transmission channel signal, and then inputs it into the s...
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The invention relates to a multichannel amplitude and phase testing system, and belongs to the technical field of microwave signal measurement. The system can guarantee that the amplitude and phase measurement precision is just limited by the internal thermal noise of a receiver and not affected by multi-site interference, and can be compatible with the parallel testing of wave beams with the same frequency and different frequencies. The system can form a plurality of virtual channels, reduces the inconsistency of a receiving channel through time dividing measurement, and effectively reduces the self-inspection and verification complexity of a transmitting end and the receiving measurement system complexity. A calibration method is complete and convenient, and eliminates the inconsistency of a channel agility matrix, a power divider, a DAC and a filter in the mode of regular offline calibration and online self-inspection and compensation. The system is high in amplitude and phase distribution configuration and measurement precision. The system is large in measurement range, and can measure the amplitude and phase relation between the intermediate frequency radio frequency wave beams. The system can achieve the expandability of the number of channels through increasing the channel number of transmitting board cards of signal processing combination signal transmitting modules and changing a signal conditioning network.
Description
technical field [0001] The invention relates to a multi-channel amplitude and phase test system, which belongs to the technical field of microwave signal measurement. Background technique [0002] With the continuous improvement of people's requirements for satellite communication, satellite communication technology has been greatly developed. Among them, satellite multi-beam antenna has become a key technology to improve satellite communication performance and reduce system cost. The multi-channel configuration of the transmitter becomes a potential source of increased amplitude and phase errors for digital beamforming antenna systems. Multiple transmitter channels connected to multiple antenna arrays must have high coherence, otherwise the mismatch between channels will seriously affect the performance of the digital beam system. The measurement of the error between multiple channels is one of the key technologies of the spaceborne digital multi-beam antenna. [0003] I...
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IPC IPC(8): G01R25/00G01R19/00
Inventor 安建平王帅宋哲方金辉林玉洁卜祥元代计博鲁楠
Owner BEIJING INSTITUTE OF TECHNOLOGYGY