研究目的
To present a radiation pattern reconfigurable antenna that can switch between a bidirectional and a unidirectional radiation pattern by modifying the size of the lower plate of two parallel metallic plates using PIN diodes and adjusting the operating frequency with a varactor diode.
研究成果
The CM theory provides a physical interpretation of the radiating behavior of an antenna. A radiation pattern reconfigurable antenna has been proposed, adjusting the radiation pattern from a bidirectional to a unidirectional pattern using PIN diodes and a varactor diode to adjust the operating frequency at both states.
研究不足
The study is based on simulations using ideal cases, including a fixed capacitor as the varactor diode and a piece of metal as a PIN diode. Practical implementation may face challenges related to the actual performance of these components.
1：Experimental Design and Method Selection:
The design is based on the characteristic mode analysis of two parallel metallic plates. The reconfigurable radiating structure uses semiconductor switches to control the radiation pattern.
2：Sample Selection and Data Sources:
Two cases are analyzed, corresponding to two plates with the same dimension and two plates with a small difference in the inferior plate length.
3：List of Experimental Equipment and Materials:
Two PIN diodes and a varactor diode are used. The simulation is carried out using CST Microwave Studio.
4：Experimental Procedures and Operational Workflow:
The antenna is fed from underneath via a probe. The state of the PIN diodes (ON/OFF) changes the radiation pattern, and the varactor diode adjusts the operating frequency.
5：Data Analysis Methods:
The behavior of the antenna is analyzed from a modal perspective, and the radiation patterns and S11 parameters are simulated for different states.
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