研究目的
Investigating the fundamental gain and directivity limitations of dense arrays and the role of embedded element efficiency in understanding the behavior of dense regular arrays.
研究成果
The embedded element efficiency fully explains the element-gain paradox and is a major factor contributing to the realized gains of dense array antennas. It becomes very low in dense arrays with element spacing smaller than half-wavelength and can be approximated by Hannan’s asymptote for such cases.
研究不足
The study is limited to simulations of an array of open-ended waveguides, and the conclusions may not be directly applicable to other types of arrays without further validation.
1：Experimental Design and Method Selection:
The study uses commercial full-wave electromagnetic solvers to evaluate directivities and aperture efficiencies of an array of open-ended waveguides for a large range of element spacing.
2：Sample Selection and Data Sources:
An array of open-ended waveguides with varying element spacing is simulated.
3：List of Experimental Equipment and Materials:
Commercial full-wave electromagnetic solvers are used.
4：Experimental Procedures and Operational Workflow:
Simulations are conducted for different element spacings, and the results are analyzed to understand the embedded element efficiency.
5：Data Analysis Methods:
The results are compared with theoretical predictions and previous findings to validate the embedded element efficiency concept.
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