Module-level error analytic control method for phased array antenna system

Abstract

The invention discloses a module-level error analytic control method for a phased array antenna system, which belongs to the technical field of electronics. The method comprises the following steps of: first, determining initial values of each module error according to a phased array system error analytic control probability model; then, establishing a numerical experiment model according to an amplitude-phase error of each module and an active unit directional diagram; next, generating a numerical test matrix; and finally, outputting a phased array antenna system error analytic control result meeting an expected requirement in a numerical experiment mode. The method finally guides a module design and an overall system design effectively by effectively regulating and controlling various types of errors of a system based on each of module errors and an interconnection mismatch influence among the module errors; and in reverse, the method also can evaluate performance indexes such as anarray minor lobe level of the phased array antenna system, a 3dB beam width, the gain loss of an array, beam-pointing accuracy and the like according to actual amplitude-phase errors of modules, and a system error caused by the interconnection mismatch of each of modules.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to array antenna technology and phased array antenna technology. Background technique [0002] A phased array antenna system usually consists of core components such as an antenna array, TR components, and a radio frequency network. These non-ideal components and modules contained in the system will cause a variety of random and spatially related errors. The superposition of all these errors will have a great impact on the phased array antenna system, which may reduce the system's resistance to electronic interference, Ability to resist anti-radiation missiles and clutter suppression. [0003] The traditional phased array antenna error analysis control method uses the principle of probability theory for analysis, for example, the technical report "The Theory of Array Antennas" (MIT Lincoln Lab., 1963) and the book "Phased Array Radar System" (National Defense Industry Press , ...

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Problems solved by technology

Generally speaking, the traditional phased array error analysis and sidelobe performance evaluation methods use the principle of probability theory for modeling and analysis. , the above method cannot obtain accurate results

In addition, the traditional analysis method does not analyze the error of each module from the concept of module level, and the system error caused by the mismatch of module interconnection is not considered, so the traditional analysis method is difficult to accurately control the error control range of each module

[0004] In general, for the phased array antenna system, how to accurately analyze the unevenness of the system (including the array deformation caused by the processing error of the device, installation tolerance, wind force, gravity and other factors), the amplitude and phase error of each module , quantization error of phase shifter, influence of array mutual coupling, and influence of module interconnection mismatch on system performance, there is no confirmed technical solution yet

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