研究目的
To present an optimization method for the design of array antennas with flat-top radiation patterns in the far-field and near-field regions.
研究成果
The optimization method for the design of antenna array with flat-top radiation pattern, applicable in both the far- and near-field regions, is introduced. The method has been demonstrated to be more effective and accurate, and the designed antennas have better overall performances with much less fluctuations.
研究不足
The method's accuracy may decrease if the inter-element spacing becomes small or the surrounding environment gets very complicated. The complexity of the iterative process is inefficient and very time consuming for massive-element antenna arrays.
1：Experimental Design and Method Selection:
The synthesis of flat-top radiation patterns is formulated as a quadratically constrained quadratic programing (QCQP) problem with equality constraints. The QCQP problem is linearized and simplified for the synthesis of far-field patterns and extended to near-field region by introducing a weighted diagonal matrix.
2：Sample Selection and Data Sources:
A flat-top sector beam antenna for base station applications and an RFID bookshelf reader antenna are designed and fabricated.
3：List of Experimental Equipment and Materials:
Patch array antennas, feeding network, Teflon dielectric substrate, FR4 substrate.
4：Experimental Procedures and Operational Workflow:
The design process includes setting up the antenna array configuration, determining the scattering parameters, and finding the optimal distribution of excitations for the array elements.
5：Data Analysis Methods:
Simulation and measurement results are compared to validate the optimization theory.
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