研究目的
Investigating the method for wide-angle scanning of the array radiation pattern by combining the simultaneous variation of phases of the excitation currents in the dipoles and of their surface impedances.
研究成果
The method of impedance synthesis for radiation pattern control, previously applied to linear dipole structures, has been successfully generalized for two-dimensional flat antenna arrays. The analytical solution allows for the calculation of dipole impedances to direct the radiation pattern's maximum in predefined directions, enabling wide-angle scanning through simultaneous variation of excitation current phases and surface impedances.
研究不足
The real part of the impedance must be positive for practical applications, limiting the scanning angles where this condition is satisfied. The method's effectiveness is demonstrated for a specific array configuration and may require adjustments for other setups.
1：Experimental Design and Method Selection:
The study involves an analytical solution for a two-dimensional dipole antenna array with thin impedance electric dipoles. The method combines the variation of excitation current phases and surface impedances for wide-angle scanning.
2：Sample Selection and Data Sources:
The array consists of thin impedance electric dipoles located at nodes of a planar rectangular grid with double periodicity.
3：List of Experimental Equipment and Materials:
The study uses a model of a 2D antenna array consisting of 25 symmetrical half-wave dipoles.
4：Experimental Procedures and Operational Workflow:
The methodology involves calculating the impedance of the dipoles to direct the maximum of the antenna radiation pattern in predefined directions.
5：Data Analysis Methods:
The analysis is based on the derived formulas for the real and imaginary parts of the dipole surface impedances and their impact on the radiation pattern.
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