阅读说明：本技术 一种应用于二维正交结构的漏波天线的传播常数的计算方法 (Calculation method of propagation constant of leaky-wave antenna applied to two-dimensional orthogonal structure ) 是由 曾祥家 李元新 龙云亮 于 2020-02-20 设计创作，主要内容包括：本发明公开了一种应用于二维正交结构的漏波天线的传播常数的计算方法,通过使用原用于一维周期漏波天线的宏元胞法,对其计算参数重新优化,得到应用于二维正交贴片结构的改进宏元胞法；然后通过双端口测量所述二维正交贴片漏波天线各个角度的散射参数；最后通过所述测得的散射参数,计算得到各个角度的传播常数,能精确得到天线各个角度上的传播常数曲线,通过多个角度的曲线,能得到目标天线的完整传播特性。(The invention discloses a method for calculating a propagation constant of a leaky-wave antenna applied to a two-dimensional orthogonal structure, which is characterized in that a macro-cell method originally used for a one-dimensional periodic leaky-wave antenna is used for re-optimizing calculation parameters of the leaky-wave antenna to obtain an improved macro-cell method applied to a two-dimensional orthogonal patch structure; then measuring scattering parameters of the two-dimensional orthogonal patch leaky-wave antenna at each angle through a double port; and finally, calculating to obtain the propagation constant of each angle through the measured scattering parameters, accurately obtaining the propagation constant curve of each angle of the antenna, and obtaining the complete propagation characteristic of the target antenna through curves of a plurality of angles.)

1. A method for calculating a propagation constant of a leaky-wave antenna applied to a two-dimensional orthogonal structure is characterized by comprising the following steps:

s1: using a macro-cell method originally used for the one-dimensional periodic leaky-wave antenna to re-optimize the calculation parameters of the macro-cell method to obtain an improved macro-cell method applied to a two-dimensional orthogonal patch structure;

s2: measuring scattering parameters of the two-dimensional orthogonal patch leaky-wave antenna at each angle through a double port;

s3: and calculating the propagation constant of each angle according to the measured scattering parameters.

2. The method for calculating the propagation constant of the leaky-wave antenna applied to the two-dimensional orthogonal structure as claimed in claim 1, wherein the two-dimensional orthogonal patch structure comprises an orthogonal metal patch radiator (3), a metal floor (4) and a feed connector (6).

3. The method as claimed in claim 1, wherein the measuring scattering parameters of each angle of the two-dimensional orthogonal patch leaky-wave antenna through the two ports comprises obtaining scattering parameters of the antenna through the two ports located at the center and the edge of the antenna, including real and imaginary values of S11, S12, S21, S22.

4. The method according to claim 1, wherein the re-optimization of the calculation parameters comprises re-performing equivalent calculation on the pitch of the periodic units and the number of the periodic units in the calculation parameters.

Technical Field

The invention relates to the field of radio, in particular to a method for calculating a propagation constant of a leaky-wave antenna applied to a two-dimensional orthogonal structure.

Background

The leaky-wave antenna has a frequency scanning function, so that the leaky-wave antenna is widely applied to conformal antennas, high-resolution radars and satellite communication. Unlike a resonant antenna, when a leaky-wave antenna operates in a leaky-wave frequency band, antenna power is radiated as a spatial wave along its long side. A common leaky-wave antenna is a one-dimensional periodic patch structure, and its radiation beam has the capability of frequency scanning on the same plane. Common two-dimensional leaky-wave antennas include a bullseye type, a radiation type, a metal array type, and the like. Common one-dimensional leaky-wave antenna radiation propagation constant or antenna radiation analysis methods include: eigenmode method, transverse cavity membrane method, deconvolution method, unit cell method, macro cell method, and reciprocity spectral domain periodicity method, periodicity spectral domain impedance method, full wave analysis method, etc. for two-dimensional leaky-wave antenna. However, the propagation constant of the existing two-dimensional orthogonal leaky-wave antenna is complex to calculate, has poor universality and is not simple and convenient.

Disclosure of Invention

The invention aims to overcome the defects of complex calculation of the propagation constant, low universality and inconvenience of the conventional two-dimensional orthogonal leaky-wave antenna, and provides a method for calculating the propagation constant of the leaky-wave antenna with a two-dimensional orthogonal structure.

In order to realize the purpose, the technical scheme is as follows:

a method for calculating a propagation constant of a leaky-wave antenna applied to a two-dimensional orthogonal structure comprises the following steps:

s1: using a macro-cell method originally used for the one-dimensional periodic leaky-wave antenna to re-optimize the calculation parameters of the macro-cell method to obtain an improved macro-cell method applied to a two-dimensional orthogonal patch structure;

s2: measuring scattering parameters of the two-dimensional orthogonal patch leaky-wave antenna at each angle through a double port;

s3: and calculating the propagation constant of each angle according to the measured scattering parameters.

Preferably, the two-dimensional orthogonal patch structure includes an orthogonal metal patch radiator, a metal floor, and a feed connector.

Preferably, the measuring the scattering parameters of the two-dimensional orthogonal patch leaky-wave antenna at each angle through the two ports comprises obtaining the scattering parameters of the antenna through the two ports located at the center and the edge of the antenna, wherein the scattering parameters comprise real part values and imaginary part values of S11, S12, S21 and S22.

Preferably, the re-optimization of the calculation parameters includes performing re-equivalent calculation on the period unit spacing and the number of the period units in the calculation parameters.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a method for calculating a propagation constant of a leaky-wave antenna applied to a two-dimensional orthogonal structure, which is characterized in that under the condition that a basic calculation method is not changed, a practical formula method for applying a macrocell method to the two-dimensional orthogonal leaky-wave antenna is obtained by corresponding to specific operations of different angles of the antenna and optimizing structure parameters of the angles, a propagation constant curve of the antenna at each angle can be accurately obtained, and the complete propagation characteristic of a target antenna can be obtained by curves of multiple angles.

Drawings

FIG. 1 is a schematic representation of the steps of the present invention;

fig. 2 is a basic diagram of a two-dimensional orthogonal patch leaky-wave antenna of the present invention, in which (1) is an arbitrary periodic patch structure and (2) is orthogonal coupling between periods;

FIG. 3 is a basic block diagram of a two-dimensional orthogonal patch leaky-wave antenna of the present invention;

fig. 4 is a top view of a two-dimensional orthogonal patch leaky-wave antenna of the present invention, in which (3) is a metal patch of an orthogonal structure, and (4) is a dielectric substrate of the antenna;

fig. 5 is a side view of a two-dimensional orthogonal patch leaky-wave antenna of the invention, in which (5) is an antenna metal floor and (6) is a coaxial feed head;

FIG. 6 is a schematic diagram of the present invention with two coaxial ports respectively disposed at the center and edge of the desired angle of the antenna;

fig. 7 is a comparison graph of the macrocell method and the simulation result calculated using the simulation S11 result.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

the invention is further illustrated below with reference to the figures and examples.