Method for improving radio frequency semi-physical simulation broadband signal angle simulation precision

Abstract

The invention relates to the technical field of simulation systems. The invention discloses a method for improving radio frequency semi-physical simulation broadband signal angle simulation precision.According to the method, an angle simulation precision system is adopted; the system comprises a signal simulation unit, an antenna array feed channel unit and a measurement unit, the signal simulation unit is composed of a signal resolving module, an intermediate frequency generation module and a radio frequency generation module and used for simulating and generating broadband radio frequency signals for simulation, and the amplitude and phase of the signals can be controlled according to needs; an antenna array feed channel is composed of a power amplifier, a switch matrix, a radio frequency cable and the like, and is used for transmitting the broadband signals generated by the signal simulation unit to different radiation positions of the antenna array. By optimizing the radio frequency link structure of a traditional radio frequency simulation system, digital amplitude and phase calibration of radar signals under the broadband condition is achieved, operability is good, efficiency is high, and the radio frequency semi-physical simulation broadband signal angle simulation precision can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of simulation systems, and relates to a method for improving the simulation precision of radio frequency semi-physical simulation broadband signal angles. Background technique [0002] In the radio frequency hardware-in-the-loop simulation system, the radar target simulation is mainly completed by the three-element antenna array. The radio frequency hardware-in-the-loop simulation system: a simulation system composed of a mathematical model, a physical effect model and an actual system, which is used to carry out simulation experiments or conduct related research. Antenna array: It is mainly composed of radio frequency feed channel, control computer and spherical antenna array. When working, the radio frequency channel feeds the radio frequency signal to each radiation unit of the antenna array according to a certain amplitude and phase under the control of the control computer. Continuous movement in azimu...

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Problems solved by technology

[0006] By customizing the attenuator, phase shifter and other devices in the feed channel of the antenna array, through debugging and screening during the production process, and strictly controlling the consistency of the amplitude-frequency characteristics and phase-frequency characteristics of the RF devices in each feed channel, it can improve The angle simulation accuracy of broadband signals has the advantage that the traditional feeder link structure and system calibration method can be used, but the debugging engineering of performance consistency between devices is difficult, and the economic cost and time cost will be greatly increased

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