Digital coding holographic antenna and regulation and control method thereof

Abstract

The invention discloses a digital coding holographic antenna and a regulation and control method thereof. The device comprises a control circuit and a radial waveguide, and the radial waveguide comprises a top metal plate and a bottom metal plate. A dipole radiation unit is loaded on the upper surface of the top metal plate; metamaterial absorption boundaries are loaded on the periphery of the radial waveguide, the radial waveguide, the top metal plate and the bottom metal plate form a cavity, the bottom metal plate is provided with a coaxial feed structure, the dipole radiation unit is a dipole unit array, each dipole unit is loaded with a radio frequency switch, and the radio frequency switches are connected with a control circuit.

Description

technical field [0001] The invention relates to the technical field of holographic antennas, in particular to a digitally coded holographic antenna and a control method thereof. Background technique [0002] The holographic principle originated from physical optics, which refers to the use of a holographic structure to record the interference fringes formed by the coherence of the reference wave and the object wave to obtain a holographic structure, and then irradiate the holographic structure with the reference wave to diffract the object wave. Compared with the traditional film that can only record the light intensity, the holographic structure can record the intensity and phase information of the object wave at the same time, so it can realize the reproduction of the object image. [0003] Unlike the many materials that can record beam interference information in the optical field, recording materials in the microwave field has always been a difficult problem, which has h...

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Problems solved by technology

In 2007, according to the uniqueness theorem of the electromagnetic field, P.Sooriyadevan realized the recording of holographic patterns by placing metal strips at the minimum point of the interference field to simulate the boundary conditions of the ideal electric wall, but this holographic structure only records the interference field The minimum value of the holographic pattern is not accurate enough, and the restored object wave has a large error with the original wave.

However, the radiating unit is a single slit instead of a pair of slits for reflection elimination treatment. The radiation characteristics of the slit vary greatly with the position of the slit, and the reflection phenomenon of the boundary is serious when the radiation efficiency of the aperture is not high; R. Guzmán-Quirós et al. proposed a An FP resonant cavity antenna based on EBG structure, but it can only realize beam scanning at several fixed azimuth angles, and the scanning range is only ±15°

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