研究目的
To reduce the mutual coupling of a dual-frequency printed monopole array using a new defected ground structure (DGS) consisting of two concentric split ring slots and to propose an effective equivalent circuit model of the DGS section.
研究成果
The mutual coupling of a printed dual-band monopole array has been effectively reduced by using compact DGS. The proposed equivalent circuit model provides a physical understanding of the DGS. Good agreement among circuit simulation, EM simulation, and experimental results validates the approach. The increased port isolation makes the array suitable for multi-antenna wireless communications.
研究不足
The study focuses on a specific configuration of a dual-frequency printed monopole array and the proposed DGS design. The applicability to other antenna configurations or frequencies may require further investigation.
1：Experimental Design and Method Selection:
The study involves designing a dual-frequency DGS for mutual coupling reduction in a printed monopole array. An equivalent circuit model is proposed to understand the coupling mechanism.
2：Sample Selection and Data Sources:
A two-element 4-shaped dual-band monopole antenna array operating at 2.1 GHz and 5.4 GHz is designed and fabricated.
3：1 GHz and 4 GHz is designed and fabricated.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: An FR4 substrate with specific properties is used. The design is simulated using Ansoft HFSS.
4：Experimental Procedures and Operational Workflow:
The DGS section is etched out from the extended ground plane of the array to minimize mutual coupling. The transmission coefficient between the two printed monopoles is measured.
5：Data Analysis Methods:
The equivalent circuit parameters are extracted from the simulated S-parameters. The results from circuit simulation, EM simulation, and measurements are compared.
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