Multi-feed-source array near-field simulator based on compact field system

Abstract

The invention discloses a multi-feed-source array near-field simulator based on a compact field system. The multi-feed-source array near-field simulator can realize high-quality near-field spherical wavefront simulation based on compact field offset focus control and a feed source array excitation source technology. The offset-focus irradiation of the reflecting surface is realized by adjusting the position of an excitation source; the near field of the biased reflecting surface is equivalent to the near field wavefront of the spherical wave source at different positions; and when the positionof the excitation source is continuously changed, the position of the equivalent spherical wave source is continuously changed, the position of the equivalent source of the near-field spherical wavefront is continuously adjustable in a large range, and an amplification relation exists between the adjustment amount and the expected control amount, that is, near-field simulation in a large-distancerange is compactly realized. The excitation source is in the form of a feed source array, and the high-quality quasi-spherical wavefront can be synthesized by weighting the amplitude and phase of thefeed source array unit, so that the problem of large wavefront distortion of spherical waves generated by single feed source excitation is solved. According to the invention, a high-quality sphericalwavefront equivalent near-field electromagnetic environment adjustable within a large distance range is realized by using a compact field.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a multi-feed source array near-field simulator based on a compact field system. Background technique [0002] With the in-depth development of communication and radar technology, the high-fidelity simulation test of electronic equipment plays an extremely important role in improving the quality of research and development and accelerating the development progress. The transmission or reception of traditional communication antennas and radar antennas interact in the form of plane wave fronts. The antenna system debugging, the whole system simulation test and system work all use the plane wave field as the environmental conditions, such as direct far field, compact field, near field The equivalent far field of the scan. However, with the development of a new generation of communication and radar technology, the electrical size of the experimental research target is increasing, and t...

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Problems solved by technology

Although the simulation test and machine debugging of the radio system can directly control the distance between the transmitting and receiving antennas, or the distance between the antenna and the radar target to achieve near-field wavefront simulation, the adjustment amount is the control amount, and the difference between the two It cannot be enlarged, which brings difficulties to the simulation test research

Although the single-feed near-field spherical wave simulator based on the compact field system can compactly realize the near-field simulation in a large distance range, the spherical wavefront formed by it has a large wavefront distortion, which brings great difficulties to the simulation test research. non-negligible error

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