研究目的
To design and develop a polarization reconfigurable 2x2 planar microstrip array antenna using PIN diodes for switching between linear and circular polarizations, suitable for C-band point-to-point communication applications.
研究成果
The proposed polarization reconfigurable array antenna successfully achieves VP, RHCP, and LHCP at 5.8 GHz with good impedance and radiation characteristics. It offers improved gain over single elements and is suitable for wireless communication applications requiring polarization diversity. Future work could focus on enhancing bandwidth and reducing losses.
研究不足
The operating bandwidth is limited by the array element and impedance matching circuit. Fabrication and measurement errors cause frequency shifts. PIN diode ohmic losses reduce gain. Mutual coupling and surface wave effects need consideration in array design.
1：Experimental Design and Method Selection:
The antenna design is based on a corner truncated square microstrip patch array with PIN diodes for reconfigurability. Electromagnetic simulation using CST Microwave Studio is employed for design and analysis.
2：Sample Selection and Data Sources:
A prototype is fabricated on a
3：6 mm thick RT Duroid substrate with εr=Measurements are conducted using a Vector Network Analyzer and anechoic chamber for radiation patterns. List of Experimental Equipment and Materials:
RT Duroid substrate, PIN diodes (SMP1320-011F), inductors (47 nH), DC bias circuits, fabrication tools.
4：Experimental Procedures and Operational Workflow:
Fabricate the antenna, apply DC bias voltages to control PIN diodes, measure S-parameters and radiation patterns for different polarization states.
5：Data Analysis Methods:
Compare simulated and measured results for impedance, axial ratio, gain, and radiation patterns using standard antenna characterization techniques.
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