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Millimeter wave phased array test and calibration method

A calibration method and millimeter wave technology, applied in the directions of radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the problems of inability to proceed in parallel, high equipment costs, and very high accuracy requirements, reducing complexity. And the effect of investment cost, test workload reduction and calibration accuracy improvement

Active Publication Date: 2016-05-25
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The main problems of the existing calibration methods are: planar near-field scanning needs to scan each channel one by one, the workload is huge, and it cannot be carried out in parallel, which is time-consuming; the millimeter-wave phased array has high precision requirements for the mechanical movement of the scanning frame. Very high, high equipment cost; this method cannot solve the influence of mutual coupling between units, and it is difficult to achieve high-precision test calibration

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  • Millimeter wave phased array test and calibration method

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Embodiment Construction

[0032] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:

[0033] The system structure of the present invention is as figure 1 As shown, the test turntable is a common azimuth / tilt rotation turntable, and the standard gain test antenna is a standard horn antenna suitable for the current working frequency band of the millimeter-wave phased array antenna tested. A standard horn antenna is installed on the beacon tower, and the horn antenna is aligned with the normal direction of the phased array antenna by adjusting the height of the beacon tower. The pattern of the phased array antenna is collected by a vector network analyzer. The collected phased array antenna pattern is processed through the millimeter wave phased array rapid test calibration algorithm to realize the rapid and high precision calibration of the millimeter wave phased array antenna.

[0034] First, an analysis model is established based o...

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Abstract

The invention discloses a millimeter wave phased array test and calibration method, relates to a millimeter wave phased array calibrated error characteristic analysis and especially relates to the channel inconsistency of a phased-array antenna and a method for calculating element antenna phase center offset. The method comprises: step1, correlation functions including phased-array antenna channel inconsistency and element antenna phase center offset are established according to a phased-array antenna pattern obtained in the test; step2, range space decomposition is performed on an optimized target parameter; and step3, the range corresponding to the strong spatial spectrum component is calculated by adopting a deterministic method, and the range corresponding to the weak spatial spectrum component is optimized by adopting a genetic algorithm. According to the invention, the calibration of the phased array pointing accuracy can be realized under a condition of less test work, the test workload is greatly reduced, the labor, material resources and working time are saved, a complex and precise flat scanning frame is not needed to use, and the complexity and input cost of the system are reduced.

Description

technical field [0001] The invention relates to the test calibration of the millimeter wave phased array, embodies the fast and high-precision test calibration capability, and particularly relates to the calculation method of the channel inconsistency of the phased array antenna and the phase center offset of the unit antenna. Background technique [0002] At present, the application of millimeter-wave phased arrays in the fields of telemetry and control, satellite communications, satellite navigation, and early warning radars is gradually increasing, and the performance of millimeter-wave phased arrays, especially the requirements for pointing accuracy, are also getting higher and higher. At present, the main method of testing and calibrating the pointing accuracy of millimeter-wave phased arrays is to scan the radiation performance of each element of the phased array through the planar near-field scanning frame, so as to correct the inconsistency between channels. The test...

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Application Information

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IPC IPC(8): G01R29/10G01S7/40G01S19/23
CPCG01R29/10G01S7/40G01S7/4026G01S19/23
Inventor 郑晓冬申建华易卿武王晓玲张磊赵麟
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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