A Design Method of Substrate Integrated Waveguide Antenna

Abstract

The invention discloses a design method of a substrate-integrated waveguide antenna. The substrate-integrated waveguide antenna includes a waveguide assembly composed of several cylindrical conductors arranged in arrays and a dielectric substrate connected to both axial ends of the waveguide assembly. One of the dielectric substrates is connected to a coaxial cable; the method includes the following steps: S1: calculate the basic solution of the scattered wave; S2: use a variety of boundary conditions to further deform the basic solution of the scattered wave in S1; S3: adopt the deformation form of the basic solution of the scattered wave in S2 The method of moments of global basis functions is rewritten, so that the design problem of substrate-integrated waveguide antenna can be transformed into the value problem of the diameter of cylindrical conductor and the distance between adjacent cylindrical conductors. When analyzing the electromagnetic wave radiation, the present invention adopts the method of moments based on the global basis function, transforms the main problem of antenna design into the calculation problem of cylindrical coordinates, and greatly reduces the amount of data for simulation calculation.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a design method of a substrate-integrated waveguide antenna. Background technique [0002] In recent years, wireless communication technology has been developed rapidly and widely used. In a communication system, due to the nonlinear characteristics of active devices, a large number of clutter signals will be generated outside the working frequency band, which will deteriorate the system performance on the one hand and interfere with other systems on the other hand. Therefore, high requirements are placed on the frequency selectivity of the antenna and filter, so as to achieve the purpose of suppressing out-of-band clutter and interference. [0003] Substrate integrated waveguide is a waveguide structure that has been studied and applied more in recent years. It not only retains the characteristics of small radiation loss, low insertion loss, and large power capacity of traditi...

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Problems solved by technology

[0004] The frequency selection characteristics of common antennas are very poor, and the suppression of out-of-band clutter and interference to the system is not obvious. Therefore, an antenna with good frequency selection characteristics is needed to suppress out-of-band clutter and interference, thereby reducing the impact on other device designs in the system. meet the requirements of the indicators, and reduce the implementation cost of the system

Moreover, at present, due to the large amount of waveguide simulation calculation data for the antenna, it is difficult to calculate reasonable antenna parameter values ​​so that the scattered wave intensity of the antenna can be optimized.

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