Broadband collinear slot waveguide slot antenna

Abstract

The invention discloses a broadband collinear slot waveguide slot antenna, and belongs to the technical field of microwave antennas. The antenna comprises a waveguide coaxial converter, a one-to-two feed waveguide and a radiation waveguide. The one-to-two feed waveguide and the radiation waveguide are symmetrically nested and combined and are separated by a common common wall; the waveguide coaxial converter is located in the center of the lower side of the one-to-two feed waveguide, and isolation walls are arranged at the two ends of the one-to-two feed waveguide and the radiation waveguide and the joint of the radiation waveguide and the waveguide coaxial converter and used for forming a closed waveguide cavity. A plurality of radiation slots are formed in the top of the radiation waveguide along the center line of the wide edge direction, the radiation slots are located on the same straight line, and disturbance blocks which are distributed alternately are arranged in a waveguide cavity of the wave radiation waveguide near the radiation slots. The broadband collinear slot waveguide slot antenna provided by the invention is wide in working bandwidth, good in cross polarization performance and not easy to generate parasitic side lobes.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a broadband collinear slot waveguide slot antenna. Background technique [0002] At present, the radar system is developing towards high resolution, multi-polarization and multi-mode as the demand guides. As one of the key subsystems of the radar system, the antenna needs to have functions such as broadband and low cross-polarization. The waveguide slot antenna has the characteristics of high efficiency, small size, light weight, compact structure, easy to obtain high gain, and has been widely used in radar and microwave communication systems. Since the birth of the waveguide slot antenna, people have carried out a lot of related research, and achieved fruitful results in theoretical research and engineering applications. [0003] At present, the waveguide slot antenna mainly has two types of slots: wide-side slot and narrow-side slot. The staggered distri...

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Problems solved by technology

This patent uses an asymmetrical ridge waveguide to realize collinear slots. Compared with dislocation line slots, the cross-polarization performance is improved and parasitic sidelobes are not easy to occur, but there are the following problems: First, the structure is complex, resulting in complex processing and high processing costs. , which is not conducive to large-scale application; secondly, due to the discontinuous section of the waveguide cavity, the wavelength of the waveguide changes significantly, which seriously affects the amplitude and phase distribution of each slot and reduces the radiation efficiency of the waveguide slot antenna; thirdly, the volume is large

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