研究目的
To develop a beamwidth reconfigurable linear array antenna utilizing three magneto-electric (ME) dipole antenna elements with no need for a complex feeding network, enabling continuously variable beamwidth under electronic control.
研究成果
The proposed three-element ME dipole linear array antenna successfully achieves continuously variable beamwidth in the E-plane from 39° to 107° with a 19.6% impedance bandwidth. The design demonstrates simplicity in principle and setup, ease of control, and a wide adjustable beamwidth range, making it suitable for flexible coverage in mobile communication systems.
研究不足
The design's complexity increases with the number of varactors, and the practical implementation may face challenges in maintaining precise control over the varactors' bias voltages.
1：Experimental Design and Method Selection:
The design involves three ME dipole antenna elements differentially excited by three parallel transverse resonant slots on a SIW cavity. Four copper posts connected to varactor diodes are symmetrically embedded between adjacent slots to manipulate the electric field perturbation in the SIW cavity.
2：Sample Selection and Data Sources:
A fully operational prototype was designed, fabricated, and tested to validate the proposed design.
3：List of Experimental Equipment and Materials:
The antenna elements are integrated onto a Rogers laminate with a box-shaped reflector. Varactor diodes (Skyworks SMV2023-011LF) and inductors (Murata LQW18A) are used for tuning and RF choking, respectively.
4：Experimental Procedures and Operational Workflow:
The prototype was tested using a Keysight N5225A network analyzer for reflection coefficients and a Satimo Starlab near-field measurement system for far-field radiation patterns.
5：Data Analysis Methods:
The performance was analyzed based on impedance bandwidth, beamwidth variation, and radiation patterns.
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