A design method of millimeter-wave high-resolution imaging dielectric lens antenna

Abstract

The invention discloses a design method of a millimeter-wave high-resolution imaging dielectric lens antenna. The method is a design method combining optical lens design technology and millimeter-wave antenna design theory, and relates to the technical field of millimeter-wave antennas. The patent of the present invention refers to the curved surface of the optical lens, and optimizes the wave aberration and geometric aberration of the system through the optical design method, so that the ‑3dB spot diameter of the feed antenna unit on the object plane is the smallest, and the gain difference of each feed antenna unit is less than 1dB . The invention has the characteristics of simple and easy design method, and proposes an innovative definition for the resolution of the millimeter wave lens antenna. The present invention can be applied to millimeter wave imaging systems.

Description

technical field [0001] The invention belongs to the technical field of millimeter-wave imaging antennas, and in particular relates to a design method of a millimeter-wave high-resolution imaging medium lens antenna for a millimeter-wave imaging system. Background technique [0002] The principle of millimeter-wave imaging is similar to that of optical imaging, except that the optical imaging system uses photosensitive film or CCD on the focal plane of the lens, and the working frequency band is visible light or infrared light, while the millimeter-wave imaging system uses a millimeter-wave antenna array. The frequency band is the millimeter wave frequency band. The optical imaging system has a high resolution, but it is difficult to work in rainy, foggy and dusty weather, and it cannot image objects under obstacles such as mud or clothing. Compared with visible light and infrared light, millimeter wave has stronger penetrating ability and can penetrate opaque objects such a...

AI Technical Summary

Problems solved by technology

Because the working principle of the millimeter-wave antenna and the photosensitive film are fundamentally different, the resolution definition of the optical system cannot be applied to the millimeter-wave imaging system, and the definition of the resolution of the optical system has no guiding significance for the design of the millimeter-wave imaging lens antenna

Researchers in the United States, Japan and other countries have studied and designed millimeter-wave lens antennas, but they are all based on the principle of designing optical imaging systems, lacking the support of millimeter-wave antenna theory

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