Method for measuring full-space radiation characteristic of an antenna
A radiation characteristic and full-space technology, applied in the antenna radiation pattern and other directions, can solve the problems of heavy workload, unsatisfactory approximate calculation effect of antenna 3D radiation pattern, large error, etc., and achieve the effect of accurate scheme
Inactive Publication Date: 2020-12-11
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
In the solution of the present invention, if the actual measurement method is used to obtain the approximate three-dimensional (3D) radiation pattern of the antenna, not only the workload is large, but also the radiation pattern on a limited number of planes can only be obtained, and the omnidirectional angle and full pitch cannot be obtained. The full spatial coverage pattern of the angle, so it is necessary to propose a new calculation to approximate the 3D radiation pattern of the antenna
[0003] At present, the approximate calculation effect of the 3D radiation pattern of the antenna at home and abroad is not ideal. The 3D pattern is interpolated by using four known sampling points located on the horizontal plane and the vertical plane. For the calculation of the 3D pattern of the half-wave symmetric oscillator Error up to 12dB
The algorithm combining rational approximation and MBPE proposed by some literatures still has some errors when calculating the pattern of half-wave symmetric oscillators. The SA approximation algorithm is simple and easy to operate, and it has a good approximation for omnidirectional antennas. However, when calculating the field strength value When the point is small, the error is large, which is not conducive to the calculation of the antenna directivity coefficient
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[0043] Taking the horizontal polarization (at this time, the E plane is the horizontal plane) as an example, the calculation process of this method is given, and the flow chart of the steps is shown in the attached figure 1 . The case of vertical polarization is the same.
[0044] When the antenna is polarized horizontally, let the E plane and the H plane coincide with the horizontal plane and the vertical plane respectively, and the horizontal plane is θ =90° plane, θ is the pitch angle, and the vertical plane is φ =90° plane, φ is the azimuth angle, as shown in Figure 2(a).
[0045] Divide the 3D space into 360×180 grids, as shown in Figure 2(b). The abscissa in the figure is 0~360, indicating the azimuth of the horizontal plane φ The value range of , the vertical coordinate is 0~180, indicates the pitch angle of the vertical plane θ , which actually covers the pitch angle range of -90°~+90° centered on the antenna radiation aperture.
[0046] The following is ba...
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The invention provides a method for measuring the full-space radiation characteristic of an antenna, and the method comprises the steps: determining a weight function according to the distances between a to-be-calculated space sampling point and an E surface and an H surface based on the fitted directional diagrams of the E surface and the H surface of the antenna, and determining an approximate field intensity value at the sampling point through the weight function, the E surface and the H surface. Compared with an existing calculation method, the scheme has the advantages that any position can be taken within the full-space range of the 360-degree azimuth angle and the 180-degree pitch angle, enough sampling points can be guaranteed to approximately calculate the full-space radiation pattern of the antenna, and the method is more accurate compared with other methods with only four or a small number of sampling points.
Description
technical field [0001] The invention belongs to the technical field of antenna measurement, and in particular relates to a calculation method for antenna full-space radiation characteristics. Background technique [0002] To accurately calculate and evaluate the relationship between the actual received signal strength of the receiving antenna and the actual transmitting power of the transmitting antenna, it is not enough to only know the horizontal and vertical radiation characteristics of the transmitting and receiving antenna, and it is also necessary to accurately describe the radiation characteristics of the antenna in the entire space . In the solution of the present invention, if the actual measurement method is used to obtain the approximate three-dimensional (3D) radiation pattern of the antenna, not only the workload is large, but also the radiation pattern on a limited number of planes can only be obtained, and the omnidirectional angle and full pitch cannot be obt...
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Login to View More IPC IPC(8): G01R29/10
CPCG01R29/10
Inventor 俞红兵许军胡绘斌吴微露李昂位林营瞿洋毕大庆刘璐
Owner NAT UNIV OF DEFENSE TECH