Near field simulator

A simulator and near-field technology, applied in near-field transmission systems, instruments, utilization of re-radiation, etc., can solve the problems of simulation test research difficulties, and achieve the effects of improving test efficiency, improving test conditions, and reducing test costs.

Active Publication Date: 2017-05-17
BEIHANG UNIV
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  • Description
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  • Application Information

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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 adjus

Method used

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Examples

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Example Embodiment

[0051] Preferred example of the present invention:

[0052] like figure 2 The reflection surface and field distribution of the near-field simulator shown are schematic, the operating frequency is 37.5GHz, and the physical optics algorithm is used to calculate. The reflection surface is a paraboloid of revolution, the size of the mouth surface: 2.75m×2.75m, the focal length is 2.75m, the virtual vertex of the sectional line of the paraboloid of revolution is 0.15m higher than the focus of the paraboloid, and the quiet zone to simulate the near-field equivalent electromagnetic environment is far from the reflection surface Along the mouth surface 3.0m. The off-focus excitation source is continuously adjusted from 0 to 0.825m, which equivalently realizes the continuous simulation of the near-field spherical wave source from infinity to 8.04m.

[0053] Among them, the excitation source is shifted to 3.3m (0.2 times the focal length) away from the vertex in the axial direction, ...

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Abstract

The invention discloses a near field simulator. Near-field spherical wave-front simulation is realized based on compact-field de-focusing control. Through continuous adjustment of the de-focused irradiation of an excitation source on a reflection plane, equivalent spherical wave sources at different distances are simulated continuously, with the purpose of compactly realizing a near-field electromagnetic environment with large distance coverage to conduct a near-field simulation test on a radio system. The near field simulator can work in a more controllable natural environment or electromagnetic environment, and is conducive to improving the test conditions of electromagnetic simulation debugging, reducing the test cost and improving the test efficiency. The near field simulator is better than an external field largely affected by natural weather. The near field simulator can work at the position of a wider-range equivalent spherical wave source, and is conducive to dynamically and variably configuring a near-field wave-front required for test and conducting a simulation test on a more vivid and changeable near-field electromagnetic environment required. The near field simulator is better than a near field of which the transmitting and receiving distance is controlled directly.

Description

technical field [0001] The present invention relates to a near-field simulator, in particular to a near-field simulator based on a compact field system, which is mainly used for compactly realizing the simulation test of a radio system, the spherical surface required for a communication antenna or a radar target to work in the near field Wave electromagnetic environment, such as short-distance communication for Massive MIMO antennas, terminal signal simulation and testing of precision guidance radars, to improve the test quality of simulation, improve test efficiency and reduce test costs. 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 fo...

Claims

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Application Information

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IPC IPC(8): H04B5/00H04B17/00H04B11/00G01S13/02
CPCG01S13/02H04B5/0025H04B11/00H04B17/00
Inventor 李志平武建华王正鹏霍鹏
Owner BEIHANG UNIV
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